PATENTS RELATED TO DEXTRAN AND RELATED COMPOUNDS

Although it is not necessary for a patent agent to have personal experience with the specific subject matter, it has its advantages. Dr. Demchick's experience includes laboratory experience involving dextran and related compounds.

Dr. Demchick is a scientist with a quarter of a century of research experience in academic, industrial and governmental settings.

If you are considering patent protection for an invention, Dr. Demchick will be glad to discuss the matter with you. There is no charge for an initial discussion.

The following sampling is to give you some sense of the types of dextran and related compounds related inventions which have received United States patent protection. The patent list is not exhaustive and is certainly not a substitute for a proper patent search . It should be noted that only U.S. Patents are included.

It should be noted that spelling, form and typographical errors in the original patents are preserved here.

Pharmaceutical compositions with wound healing or anti-complementary activity comprising a dextran derivative (United States Patent 7,101,863)

Vascular prosthesis impregnated with crosslinked dextran (United States Patent 6,991,648)

Process for producing an iron-dextran compound, iron-dextran compound produced according to said process, pharmaceutical composition for prophylaxis or treatment of iron-deficiency and use of said compound for the preparation of parenterally administrable pharmaceutical composition (United States Patent 6,977,249)

Dextran-coated surface (United States Patent 6,974,707)

Biomaterial based on an insolubilized dextran derivative and a growth factor (United States Patent 6,946,443)

Conjugate of a tissue non-specific alkaline phosphatase and dextran, process for its production and use thereof (United States Patent 6,905,689)

Dextran starch and flocculant combination for improving red mud clarification (United States Patent 6,726,845)

Pelletized chromatography media of agarose, dextran or acrylamide/azlactone copolymer (United States Patent 6,709,743)

Process of making carboxylated dextran (United States Patent 6,703,499)

X-ray imaging of tumors with dextran carrier of platinum compounds (United States Patent 6,694,171)

Hybridization buffers using low molecular weight dextran sulfate and methods for their use (United States Patent 6,656,685)

Dextran derivatives, preparation and medicinal applications (United States Patent 6,646,120)

Process for producing dextran reduced in boron content (United States Patent 6,632,939)

Comixture of dextran sulfate/escin for treating skin redness/edema and/or sensitive skin (United States Patent 6,562,355)

Alkaline tolerant dextranase from streptomyces anulatus (United States Patent 6,509,184)

Dextran-maleic acid monoesters and hydrogels based thereon (United States Patent 6,476,204)

Skin cosmetic compositions containing dextran or maltodextrin and a weak carboxylic acid (United States Patent 6,440,432)

Use of dextran and other polysaccharides to improve mucus clearance (United States Patent 6,339,075)

Iron-dextran compound for use as a component in a therapeutical composition for prophylaxis or treatment of iron-deficiency (United States Patent 6,291,440)

Methods relating to immunogenic dextran-protein conjugates (United States Patent 6,287,568)

Article for tuesyl-activated dextran for solid-phase coupling (United States Patent 6,262,256)

Products containing a dextran composition obtained from culturing Leuconostoc mesenteroidesssp. cremoris (United States Patent 6,242,226)

Compositions prepared to contain active dextran sucrase produced by Leuconostoc mesenteroides ssp. cremoris (United States Patent 6,235,511)

Injectable bio-active glass in a dextran suspension (United States Patent 6,190,684)

Recombinant enzyme with dextranase activity (United States Patent 6,156,553)

Leuconostoc strains for biosynthesis of dextran (United States Patent 6,004,800)

Dextran formulations and method for treatment of inflammatory joint disorders (United States Patent 5,902,800)

Method of preparing tresyl-activated dextran, article having tresyl-activated dextran fixed covalently to its surface, and immobilization of chemical compounds thereto (United States Patent 5,874,569)

Injectable bio-active glass in a dextran suspension (United States Patent 5,840,290)

Rapid screening method to select microorganism strains that produce a high proportion of alternan to dextran (United States Patent 5,789,209)

Process for making crystalline iron dextran (United States Patent 5,756,715)

Water-soluble dextran fatty acid esters and their use as solubilizers (United States Patent 5,750,678)

Dextran esters, the preparation thereof and the use thereof for coating or embedding drugs (United States Patent 5,739,122)

Microorganism strains that produce a high proportion of alternan to dextran (United States Patent 5,702,942)

Method of regenerating cells and tissues using functionalized dextrans (United States Patent 5,693,625)

Dextranase enzyme, method for its production and DNA encoding the enzyme (United States Patent 5,637,491)

Multivalent dextran reagent for use in precipitation tests (United States Patent 5,627,078)

Iron dextran formulations (United States Patent 5,624,668)

Ageing improvements of photographic elements comprising dextran (United States Patent 5,609,986)

Methods and compositions for inhibition of cell invasion and fibrosis using dextran sulfate (United States Patent 5,605,938)

Method of preventing or reducing the risk of infection by bacterial pathogens utilizing simple and conjugated dextrans (United States Patent 5,514,665)

Method for preparing an antitumor dextran using a dextran synthetase from Lactobacillus confusus (United States Patent 5,484,715)

Adenosine dextran conjugates (United States Patent 5,424,297)

Method for preparing an antitumor dextran using Lactobacillus confusus (United States Patent 5,424,201)

Lithographic base with a modified dextran or pullulan hydrophilic layer (United States Patent 5,402,725)

Preparation and magnetic properties of very small magnetite-dextran particles (United States Patent 5,349,957)

Cloning and overexpression of glucose-6-phosphate dehydrogenase from Leuconostoc dextranicus (United States Patent 5,308,770)

19F labelled dextrans and antibodies as NMR imaging and spectroscopy agents (United States Patent 5,236,694)

Cloning and overexpression of glucose-6-phosphate dehydrogenase from leuconostoc dextranicus (United States Patent 5,229,286)

Process for the production of dextran polymers of controlled molecular size and molecular size distributions (United States Patent 5,229,277)

Leuconostoc Dextranicum NRRL-B-18242 (United States Patent 5,223,431)

Dry test strip comprising a dextran barrier for excluding erythrocytes (United States Patent 5,212,060)

Reaction product of grafted dextranomer and a phthalocyanine dye (United States Patent 5,179,202)

Modified dextran binder for use in thermal dye transfer (United States Patent 5,151,405)

Iodinated polymers with dextran skeleton, processes for their preparation and their uses as contrast products (United States Patent 5,126,440)

Method of manufacturing powdered fruit juice using dextran (United States Patent 5,118,517)

Use of dextran as a filtration aid for thickener overflow filtration in Kelly filters in the Bayer process (United States Patent 5,091,159)

Use of dextran sulphate for the treatment of human prostatic carcinoma (United States Patent 5,055,301)

Polymers derived from crosslinked polystyrenes and dextrans, their methods of preparation and their applications for the analysis and purification of molecules of biological origin (United States Patent 5,019,269)

Method to derivatize dextran (United States Patent 4,975,532)

Polymers derived from crosslinked polystyrenes and dextrans, their methods of preparation and their applications for the analysis and purification of molecules of biological origin (United States Patent 4,950,712)

Novel dextran produced by leuconostoc dextranicum (United States Patent 4,933,191)

Saturated salt/concentrated dextran formulation to treat hemorrhage (United States Patent 4,927,806)

Water soluble iron dextran and a process for its manufacture (United States Patent 4,927,756)

Photographic proteinaceous layers comprising dextran derivatives (United States Patent 4,879,209)

Method for the manufacture of dextran sulfate and salts thereof (United States Patent 4,855,416)

Method of producing dextranase (United States Patent 4,820,640)

Photographic surface layers comprising dextran derivatives (United States Patent 4,820,613)

Diethylaminoethyl dextran for decreasing hyperglycemia (United States Patent 4,810,696)

Method for the production of bead dextran materials for gel chromatography (United States Patent 4,794,177)

Dextran hexonic acid derivative, ferric hydroxide complex and method manufacture thereof (United States Patent 4,788,281)

Modified dextrans in a dental health method deactivating glucosyltransferase enzymes (United States Patent 4,767,614)

Water soluble iron dextran and a process for its manufacture (United States Patent 4,749,695)

Dextran derivatives endowed, particularly with anti-coagulant properties and anti-complementary properties, their preparation and their biological uses (United States Patent 4,740,594)

Method of producing dextranase (United States Patent 4,732,854)

Dextran or crosslinked dextran having quaternary amino groups (United States Patent 4,591,638)

Process for the purification of dextran-sucrase (United States Patent 4,591,563)

Fibronectin-dextran-drug complex and method of preparation thereof (United States Patent 4,587,122)

Enzyme electrode and method for dextran analysis (United States Patent 4,552,840)

Manufacture of diethylaminoethyl dextrans (United States Patent 4,507,472)

Process for the separation and purification of dextranase (United States Patent 4,490,470)

Magnetic iron-dextran microspheres (United States Patent 4,452,773)

Dextran derivative of fibrinolysin (United States Patent 4,446,316)

Oral composition containing dextranase and .alpha.-1,3 glucanase and a method for preventing and suppressing oral diseases using the same (United States Patent 4,438,093)

Cationized dextran and salts thereof and manufacturing process and utilization thereof (United States Patent 4,411,891)

Dextran polycarboxylic acids, ferric hydroxide complexes (United States Patent 4,370,476)

Method of inhibiting dextransucrase and oral compositions for use therein (United States Patent 4,335,100)

Solid pharmaceutical or diagnostic agent containing dextran and its preparation (United States Patent 4,315,002)

Article of manufacture comprising semipermeable polymer and dextran derivative (United States Patent 4,286,067)

Dextran composition for controlling corneal hydration (United States Patent 4,271,144)

Method of inhibiting dextransucrase and oral compositions for use therein (United States Patent 4,228,150)

Oral compositions containing dextranase (United States Patent 4,140,758)

Oral compositions containing dextranase (United States Patent 4,115,546)

Method for separation of dextrans (United States Patent 4,104,078)

Magnetic iron oxide-dextran complex and process for its production (United States Patent 4,101,435)

Vinylic group containing dextran derivative gel in particle form for separation purposes (United States Patent 4,094,833)

Vinylic group containing dextran derivative gel for use in electrophoretic separation processes (United States Patent 4,094,832)

Process for purifying coagulation factor VIII using DEAE-crosslinked dextran (United States Patent 4,093,608)

Dextran ester-olefin compound copolymer and process for preparing same (United States Patent 4,032,488)

Oral compositions containing dextranase (United States Patent 3,991,177)

Pharmaceutical compositions with wound healing or anti-complementary activity comprising a dextran derivative (United States Patent 7,101,863)

Vascular prosthesis impregnated with crosslinked dextran (United States Patent 6,991,648)

Process for producing an iron-dextran compound, iron-dextran compound produced according to said process, pharmaceutical composition for prophylaxis or treatment of iron-deficiency and use of said compound for the preparation of parenterally administrable pharmaceutical composition (United States Patent 6,977,249)

Dextran-coated surface (United States Patent 6,974,707)

Biomaterial based on an insolubilized dextran derivative and a growth factor (United States Patent 6,946,443)

Conjugate of a tissue non-specific alkaline phosphatase and dextran, process for its production and use thereof (United States Patent 6,905,689)

Dextran starch and flocculant combination for improving red mud clarification (United States Patent 6,726,845)

Pelletized chromatography media of agarose, dextran or acrylamide/azlactone copolymer (United States Patent 6,709,743)

Process of making carboxylated dextran (United States Patent 6,703,499)

X-ray imaging of tumors with dextran carrier of platinum compounds (United States Patent 6,694,171)

Hybridization buffers using low molecular weight dextran sulfate and methods for their use (United States Patent 6,656,685)

Dextran derivatives, preparation and medicinal applications (United States Patent 6,646,120)

Process for producing dextran reduced in boron content (United States Patent 6,632,939)

Comixture of dextran sulfate/escin for treating skin redness/edema and/or sensitive skin (United States Patent 6,562,355)

Alkaline tolerant dextranase from streptomyces anulatus (United States Patent 6,509,184)

Dextran-maleic acid monoesters and hydrogels based thereon (United States Patent 6,476,204)

Skin cosmetic compositions containing dextran or maltodextrin and a weak carboxylic acid (United States Patent 6,440,432)

Use of dextran and other polysaccharides to improve mucus clearance (United States Patent 6,339,075)

Iron-dextran compound for use as a component in a therapeutical composition for prophylaxis or treatment of iron-deficiency (United States Patent 6,291,440)

Methods relating to immunogenic dextran-protein conjugates (United States Patent 6,287,568)

Article for tuesyl-activated dextran for solid-phase coupling (United States Patent 6,262,256)

Products containing a dextran composition obtained from culturing Leuconostoc mesenteroidesssp. cremoris (United States Patent 6,242,226)

Compositions prepared to contain active dextran sucrase produced by Leuconostoc mesenteroides ssp. cremoris (United States Patent 6,235,511)

Injectable bio-active glass in a dextran suspension (United States Patent 6,190,684)

Recombinant enzyme with dextranase activity (United States Patent 6,156,553)

Leuconostoc strains for biosynthesis of dextran (United States Patent 6,004,800)

Dextran formulations and method for treatment of inflammatory joint disorders (United States Patent 5,902,800)

Method of preparing tresyl-activated dextran, article having tresyl-activated dextran fixed covalently to its surface, and immobilization of chemical compounds thereto (United States Patent 5,874,569)

Injectable bio-active glass in a dextran suspension (United States Patent 5,840,290)

Rapid screening method to select microorganism strains that produce a high proportion of alternan to dextran (United States Patent 5,789,209)

Process for making crystalline iron dextran (United States Patent 5,756,715)

Water-soluble dextran fatty acid esters and their use as solubilizers (United States Patent 5,750,678)

Dextran esters, the preparation thereof and the use thereof for coating or embedding drugs (United States Patent 5,739,122)

Microorganism strains that produce a high proportion of alternan to dextran (United States Patent 5,702,942)

Method of regenerating cells and tissues using functionalized dextrans (United States Patent 5,693,625)

Dextranase enzyme, method for its production and DNA encoding the enzyme (United States Patent 5,637,491)

Multivalent dextran reagent for use in precipitation tests (United States Patent 5,627,078)

Iron dextran formulations (United States Patent 5,624,668)

Ageing improvements of photographic elements comprising dextran (United States Patent 5,609,986)

Methods and compositions for inhibition of cell invasion and fibrosis using dextran sulfate (United States Patent 5,605,938)

Method of preventing or reducing the risk of infection by bacterial pathogens utilizing simple and conjugated dextrans (United States Patent 5,514,665)

Method for preparing an antitumor dextran using a dextran synthetase from Lactobacillus confusus (United States Patent 5,484,715)

Adenosine dextran conjugates (United States Patent 5,424,297)

Method for preparing an antitumor dextran using Lactobacillus confusus (United States Patent 5,424,201)

Lithographic base with a modified dextran or pullulan hydrophilic layer (United States Patent 5,402,725)

Preparation and magnetic properties of very small magnetite-dextran particles (United States Patent 5,349,957)

Cloning and overexpression of glucose-6-phosphate dehydrogenase from Leuconostoc dextranicus (United States Patent 5,308,770)

19F labelled dextrans and antibodies as NMR imaging and spectroscopy agents (United States Patent 5,236,694)

Cloning and overexpression of glucose-6-phosphate dehydrogenase from leuconostoc dextranicus (United States Patent 5,229,286)

Process for the production of dextran polymers of controlled molecular size and molecular size distributions (United States Patent 5,229,277)

Leuconostoc Dextranicum NRRL-B-18242 (United States Patent 5,223,431)

Dry test strip comprising a dextran barrier for excluding erythrocytes (United States Patent 5,212,060)

Reaction product of grafted dextranomer and a phthalocyanine dye (United States Patent 5,179,202)

Modified dextran binder for use in thermal dye transfer (United States Patent 5,151,405)

Iodinated polymers with dextran skeleton, processes for their preparation and their uses as contrast products (United States Patent 5,126,440)

Method of manufacturing powdered fruit juice using dextran (United States Patent 5,118,517)

Use of dextran as a filtration aid for thickener overflow filtration in Kelly filters in the Bayer process (United States Patent 5,091,159)

Use of dextran sulphate for the treatment of human prostatic carcinoma (United States Patent 5,055,301)

Polymers derived from crosslinked polystyrenes and dextrans, their methods of preparation and their applications for the analysis and purification of molecules of biological origin (United States Patent 5,019,269)

Method to derivatize dextran (United States Patent 4,975,532)

Polymers derived from crosslinked polystyrenes and dextrans, their methods of preparation and their applications for the analysis and purification of molecules of biological origin (United States Patent 4,950,712)

Novel dextran produced by leuconostoc dextranicum (United States Patent 4,933,191)

Saturated salt/concentrated dextran formulation to treat hemorrhage (United States Patent 4,927,806)

Water soluble iron dextran and a process for its manufacture (United States Patent 4,927,756)

Photographic proteinaceous layers comprising dextran derivatives (United States Patent 4,879,209)

Method for the manufacture of dextran sulfate and salts thereof (United States Patent 4,855,416)

Method of producing dextranase (United States Patent 4,820,640)

Photographic surface layers comprising dextran derivatives (United States Patent 4,820,613)

Diethylaminoethyl dextran for decreasing hyperglycemia (United States Patent 4,810,696)

Method for the production of bead dextran materials for gel chromatography (United States Patent 4,794,177)

Dextran hexonic acid derivative, ferric hydroxide complex and method manufacture thereof (United States Patent 4,788,281)

Modified dextrans in a dental health method deactivating glucosyltransferase enzymes (United States Patent 4,767,614)

Water soluble iron dextran and a process for its manufacture (United States Patent 4,749,695)

Dextran derivatives endowed, particularly with anti-coagulant properties and anti-complementary properties, their preparation and their biological uses (United States Patent 4,740,594)

Method of producing dextranase (United States Patent 4,732,854)

Dextran or crosslinked dextran having quaternary amino groups (United States Patent 4,591,638)

Process for the purification of dextran-sucrase (United States Patent 4,591,563)

Fibronectin-dextran-drug complex and method of preparation thereof (United States Patent 4,587,122)

Enzyme electrode and method for dextran analysis (United States Patent 4,552,840)

Manufacture of diethylaminoethyl dextrans (United States Patent 4,507,472)

Process for the separation and purification of dextranase (United States Patent 4,490,470)

Magnetic iron-dextran microspheres (United States Patent 4,452,773)

Dextran derivative of fibrinolysin (United States Patent 4,446,316)

Oral composition containing dextranase and .alpha.-1,3 glucanase and a method for preventing and suppressing oral diseases using the same (United States Patent 4,438,093)

Cationized dextran and salts thereof and manufacturing process and utilization thereof (United States Patent 4,411,891)

Dextran polycarboxylic acids, ferric hydroxide complexes (United States Patent 4,370,476)

Method of inhibiting dextransucrase and oral compositions for use therein (United States Patent 4,335,100)

Solid pharmaceutical or diagnostic agent containing dextran and its preparation (United States Patent 4,315,002)

Article of manufacture comprising semipermeable polymer and dextran derivative (United States Patent 4,286,067)

Dextran composition for controlling corneal hydration (United States Patent 4,271,144)

Method of inhibiting dextransucrase and oral compositions for use therein (United States Patent 4,228,150)

Oral compositions containing dextranase (United States Patent 4,140,758)

Oral compositions containing dextranase (United States Patent 4,115,546)

Method for separation of dextrans (United States Patent 4,104,078)

Magnetic iron oxide-dextran complex and process for its production (United States Patent 4,101,435)

Vinylic group containing dextran derivative gel in particle form for separation purposes (United States Patent 4,094,833)

Vinylic group containing dextran derivative gel for use in electrophoretic separation processes (United States Patent 4,094,832)

Process for purifying coagulation factor VIII using DEAE-crosslinked dextran (United States Patent 4,093,608)

Dextran ester-olefin compound copolymer and process for preparing same (United States Patent 4,032,488)

Oral compositions containing dextranase (United States Patent 3,991,177)

Although his recognition as a registered patent agent permits him to represent others in all patent matters before the United States Patent and Trademark Office, Dr. Demchick limits his practice to patent matters involving inventions for which he is confident that his expertise will allow him to serve his client well. He will gladly discuss whether he is comfortable handling cases involving inventions in a particular field. He will err on the side of declining cases if he has uncertainty about his ability to do what is needed in the case. Dr. Demchick does not represent clients in court. However, he refers clients to a patent attorney who does represent others in court, if it appears likely that patent related representation in court is appropriate. Dr. Demchick prepares and files non-provisional (regular) patent applications and provisional patent applications. He prepares and files utility patent applications and design patent applications. He prepares and files U.S. patent applications and international patent applications under the Patent Cooperation Treaty (PCT). He prepares and files applications to enter the U.S. National Phase for inventions for which international patent applications (PCT) were already filed. One of the matters he discusses with each client or potential client is which type of application(s) best meets that client's needs. He usually does a patent search (patentability search) as part of the preparation of a patent application. He discusses the value of patent searching with each inventor before agreeing to prepare a patent application for that inventor.