PATENTS RELATED TO CHROMATOGRAPHY

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 chromatography.

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 chromatography 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.

Apparatus and method for rapidly, eco-friendly sample preparation prior to chromatographic determination of chemical substances (United States Patent 7,152,459)

Device for automated coupling between a micro-chromatograph and a mass spectrometer comprising a temperature adjustment (United States Patent 7,148,475)

Microfabricated microconcentrator for sensors and gas chromatography (United States Patent 7,147,695)

Protein complex from ion-exchange chromatography for treatment of bacterial infections (United States Patent 7,144,855)

Preparation and use of mixed mode solid substrates for chromatography adsorbents and biochip arrays (United States Patent 7,144,743)

Method for chromatographic finger printing and standardization of single medicines and formulations (United States Patent 7,144,740)

Chromatography system with gradient storage and method for operating the same (United States Patent 7,144,502)

Liquid chromatographic separation of polynucleotides (United States Patent 7,138,518)

Flash chromatography cartridge (United States Patent 7,138,061)

Chromatography system, method and software for the separation of biomolecules (United States Patent 7,138,051)

Fractionating/collecting device of liquid chromatograph (United States Patent 7,138,050)

Gas chromatograph set (United States Patent 7,137,286)

Method for enhanced accuracy in predicting peptides using liquid separations or chromatography (United States Patent 7,136,759)

Methods and compositions for mutation analysis of polynucleotides by liquid chromatography (United States Patent 7,135,289)

Method and system for sub-ambient pressure control for column head pressure in gas chromatography systems (United States Patent 7,135,056)

Protective device for the chromatographic bed in dynamic axial compression chromatographic columns (United States Patent 7,132,053)

Stainless steel tubing/frit with sintered inorganic particle, the chromatography comprising it, and their manufacturing method (United States Patent 7,132,046)

Gas chromatograph having a radiant oven for analytical devices (United States Patent 7,130,534)

Immuno-chromatographic rapid assay in order to detect acid-resistant microorganisms in the stool (United States Patent 7,129,053)

Chromatographic separation (United States Patent 7,128,833)

Polar-modified bonded phase materials for chromatographic separations (United States Patent 7,125,488)

Polycapillary chromatographic column and method of its manufacturing (United States Patent 7,118,671)

Retentate chromatography and protein chip arrays with applications in biology and medicine (United States Patent 7,112,453)

Method and device for comprehensive two-dimensional gas chromatography (United States Patent 7,107,818)

Retentate chromatography and protein chip arrays with applications in biology and medicine (United States Patent 7,105,339)

Sealing mechanism for gas chromatograph machines (United States Patent 7,105,043)

Control of ph transitions during chromatography (United States Patent 7,101,982)

Liquid chromatography column having metal to metal seals (United States Patent 7,101,477)

Method and device for packing chromatography columns (United States Patent 7,094,352)

Purification of substances by reaction affinity chromatography (United States Patent 7,094,351)

Partial modulation via pulsed flow modulator for comprehensive two-dimensional liquid or gas chromatography (United States Patent 7,091,044)

Method for purifying enzymes from clostridium histolyticum using multi-stage chromatography (United States Patent 7,083,964)

Sample preparation for parallel chromatography (United States Patent 7,074,327)

Method of using data binning in the analysis of chromatography/spectrometry data (United States Patent 7,072,773)

Liquid chromatograph and analysis system (United States Patent 7,066,011)

Mass chromatograph (United States Patent 7,064,320)

Pump for liquid chromatography (United States Patent 7,063,785)

Liquid chromatograph pump with dual cylinders and dual plungers (United States Patent 7,063,513)

Sample valve with integral sample shut off function for chromatograph (United States Patent 7,063,302)

Method and apparatus for liquid chromatography automated sample loading (United States Patent 7,055,402)

Chromatograph mass spectrometric apparatus and method of calibrating the same (United States Patent 7,053,365)

Disposable immunoassay sample-collector and chromatographic-testing device (United States Patent 7,052,651)

Scalable inlet liquid distribution system for large scale chromatography columns (United States Patent 7,051,758)

Pump as a pressure source for supercritical fluid chromatography (United States Patent 7,048,517)

Universal bonded phase material for chromatographic separation (United States Patent 7,045,059)

Method for the chromatographic fractionation of plasma or serum, preparations, so obtained, and their use (United States Patent 7,041,798)

Chromatography column (United States Patent 7,041,216)

Enrichment process for H. pylori neutrophil activating protein (NAP) utilizing metal chelate chromatography (United States Patent 7,038,012)

Packings for liquid chromatography, process for preparing and usage (United States Patent 7,033,505)

Coupling electrochemistry to mass spectrometry and high performance liquid chromatography (United States Patent 7,028,537)

Multi column chromatography system (United States Patent 7,018,540)

Alkali-stable hydrophilic sorbents for ion-exchange chromatography (United States Patent 7,015,281)

Method and apparatus for enhanced detection of a specie using a gas chromatograph (United States Patent 7,013,707)

Chiral polysaccharide esters, one of the methods for preparing them and their uses for obtaining optically enriched acids or for chiral chromatography (United States Patent 7,012,138)

Stimulus responsive affinity chromatographic material and separation/purification method (United States Patent 7,012,136)

Dynamic background signal exclusion in chromatography/mass spectrometry data-dependent, data acquisition (United States Patent 7,009,174)

Disposable chromatographic columns (United States Patent 7,008,541)

Material for chromatography (United States Patent 7,008,534)

Chromatographic device having an elongate rod and method of forming and chromatographic device (United States Patent 7,008,532)

Micropump assembly for a microgas chromatograph and the like (United States Patent 7,008,193)

Collection device for lateral flow chromatography (United States Patent 6,998,273)

Selective fluoride and ammonia removal by chromatographic separation of wastewater (United States Patent 6,998,054)

Capillary column chromatography process and system (United States Patent 6,993,958)

Systems and methods for performing magnetic chromatography assays (United States Patent 6,991,912)

Automated capillary liquid chromatography small volume analysis system (United States Patent 6,989,129)

Methods for time-alignment of liquid chromatography-mass spectrometry data (United States Patent 6,989,100)

Chromatographic column seal (United States Patent 6,984,318)

Parallel detection chromatography systems (United States Patent 6,976,384)

Analyte pre-concentrator for gas chromatography (United States Patent 6,974,495)

Regeneration of chromatography material (United States Patent 6,972,327)

Composite chromatographic sorbent of mineral oxide beads with hydroxyapatite-filled pores (United States Patent 6,972,090)

Chromatographic or spectroscopic reports with hyperlinks to allow direct access to external references (United States Patent 6,971,059)

Detection of nucleic acid heteroduplex molecules by anion-exchange chromatography (United States Patent 6,969,587)

Methods and apparatus for packing chromatography columns and chromatography column (United States Patent 6,966,991)

Method and system for viewing chromatographic peaks over a network (United States Patent 6,961,072)

Chromatographic method for high yield purification and viral inactivation of antibodies (United States Patent 6,955,917)

Liquid chromatograph (United States Patent 6,955,760)

Method and device for vaporization injection of high volumes in gas chromatographic analysis (United States Patent 6,955,709)

Isolation of neurotrophins from a mixture containing neurotrophin variants using hydrophobic interaction chromatography (United States Patent 6,953,844)

Method for the gas chromatographic analysis of a sample, and analyzer (United States Patent 6,952,946)

Disposable chromatographic columns (United States Patent 6,949,194)

Methods and compositions for chromatography (United States Patent 6,942,804)

Removal of bacterial endotoxin in a protein solution by immobilized metal affinity chromatography (United States Patent 6,942,802)

High velocity chromatography column flow distributor (United States Patent 6,942,794)

Liquid chromatograph mass spectrometer (United States Patent 6,942,793)

Mixer for liquid chromatograph (United States Patent 6,942,792)

Median filter for liquid chromatography-mass spectrometry data (United States Patent 6,936,814)

Method for controlling an evaporative light scattering detector which is coupled to a liquid chromatography column (United States Patent 6,936,174)

System and method for performing multiple parallel chromatographic separations (United States Patent 6,936,167)

Endpiece for a chromatography column (United States Patent 6,936,166)

System for high throughput sample preparation and analysis using column chromatography (United States Patent 6,932,939)

Chromatographic device and method of forming a chromatographic device (United States Patent 6,932,904)

Vaporizer tube for vaporizing liquid samples in capillary gas chromatography (United States Patent 6,929,780)

High-affinity, low-molecular-mass displacers for ion-exchange chromatography (United States Patent 6,929,747)

Column packaging for chromatography (United States Patent 6,929,741)

Use of a weakly acid cation exchange resin for chromatographic separation of carbohydrates (United States Patent 6,924,371)

Liquid chromatograph pump and control method therefor (United States Patent 6,923,916)

Intake cross-sheets for gas chromatographic oven (United States Patent 6,920,777)

Apparatus and method for rapidly, eco-friendly sample preparation prior to chromatographic determination of chemical substances (United States Patent 7,152,459)

Device for automated coupling between a micro-chromatograph and a mass spectrometer comprising a temperature adjustment (United States Patent 7,148,475)

Microfabricated microconcentrator for sensors and gas chromatography (United States Patent 7,147,695)

Protein complex from ion-exchange chromatography for treatment of bacterial infections (United States Patent 7,144,855)

Preparation and use of mixed mode solid substrates for chromatography adsorbents and biochip arrays (United States Patent 7,144,743)

Method for chromatographic finger printing and standardization of single medicines and formulations (United States Patent 7,144,740)

Chromatography system with gradient storage and method for operating the same (United States Patent 7,144,502)

Liquid chromatographic separation of polynucleotides (United States Patent 7,138,518)

Flash chromatography cartridge (United States Patent 7,138,061)

Chromatography system, method and software for the separation of biomolecules (United States Patent 7,138,051)

Fractionating/collecting device of liquid chromatograph (United States Patent 7,138,050)

Gas chromatograph set (United States Patent 7,137,286)

Method for enhanced accuracy in predicting peptides using liquid separations or chromatography (United States Patent 7,136,759)

Methods and compositions for mutation analysis of polynucleotides by liquid chromatography (United States Patent 7,135,289)

Method and system for sub-ambient pressure control for column head pressure in gas chromatography systems (United States Patent 7,135,056)

Protective device for the chromatographic bed in dynamic axial compression chromatographic columns (United States Patent 7,132,053)

Stainless steel tubing/frit with sintered inorganic particle, the chromatography comprising it, and their manufacturing method (United States Patent 7,132,046)

Gas chromatograph having a radiant oven for analytical devices (United States Patent 7,130,534)

Immuno-chromatographic rapid assay in order to detect acid-resistant microorganisms in the stool (United States Patent 7,129,053)

Chromatographic separation (United States Patent 7,128,833)

Polar-modified bonded phase materials for chromatographic separations (United States Patent 7,125,488)

Polycapillary chromatographic column and method of its manufacturing (United States Patent 7,118,671)

Retentate chromatography and protein chip arrays with applications in biology and medicine (United States Patent 7,112,453)

Method and device for comprehensive two-dimensional gas chromatography (United States Patent 7,107,818)

Retentate chromatography and protein chip arrays with applications in biology and medicine (United States Patent 7,105,339)

Sealing mechanism for gas chromatograph machines (United States Patent 7,105,043)

Control of ph transitions during chromatography (United States Patent 7,101,982)

Liquid chromatography column having metal to metal seals (United States Patent 7,101,477)

Method and device for packing chromatography columns (United States Patent 7,094,352)

Purification of substances by reaction affinity chromatography (United States Patent 7,094,351)

Partial modulation via pulsed flow modulator for comprehensive two-dimensional liquid or gas chromatography (United States Patent 7,091,044)

Method for purifying enzymes from clostridium histolyticum using multi-stage chromatography (United States Patent 7,083,964)

Sample preparation for parallel chromatography (United States Patent 7,074,327)

Method of using data binning in the analysis of chromatography/spectrometry data (United States Patent 7,072,773)

Liquid chromatograph and analysis system (United States Patent 7,066,011)

Mass chromatograph (United States Patent 7,064,320)

Pump for liquid chromatography (United States Patent 7,063,785)

Liquid chromatograph pump with dual cylinders and dual plungers (United States Patent 7,063,513)

Sample valve with integral sample shut off function for chromatograph (United States Patent 7,063,302)

Method and apparatus for liquid chromatography automated sample loading (United States Patent 7,055,402)

Chromatograph mass spectrometric apparatus and method of calibrating the same (United States Patent 7,053,365)

Disposable immunoassay sample-collector and chromatographic-testing device (United States Patent 7,052,651)

Scalable inlet liquid distribution system for large scale chromatography columns (United States Patent 7,051,758)

Pump as a pressure source for supercritical fluid chromatography (United States Patent 7,048,517)

Universal bonded phase material for chromatographic separation (United States Patent 7,045,059)

Method for the chromatographic fractionation of plasma or serum, preparations, so obtained, and their use (United States Patent 7,041,798)

Chromatography column (United States Patent 7,041,216)

Enrichment process for H. pylori neutrophil activating protein (NAP) utilizing metal chelate chromatography (United States Patent 7,038,012)

Packings for liquid chromatography, process for preparing and usage (United States Patent 7,033,505)

Coupling electrochemistry to mass spectrometry and high performance liquid chromatography (United States Patent 7,028,537)

Multi column chromatography system (United States Patent 7,018,540)

Alkali-stable hydrophilic sorbents for ion-exchange chromatography (United States Patent 7,015,281)

Method and apparatus for enhanced detection of a specie using a gas chromatograph (United States Patent 7,013,707)

Chiral polysaccharide esters, one of the methods for preparing them and their uses for obtaining optically enriched acids or for chiral chromatography (United States Patent 7,012,138)

Stimulus responsive affinity chromatographic material and separation/purification method (United States Patent 7,012,136)

Dynamic background signal exclusion in chromatography/mass spectrometry data-dependent, data acquisition (United States Patent 7,009,174)

Disposable chromatographic columns (United States Patent 7,008,541)

Material for chromatography (United States Patent 7,008,534)

Chromatographic device having an elongate rod and method of forming and chromatographic device (United States Patent 7,008,532)

Micropump assembly for a microgas chromatograph and the like (United States Patent 7,008,193)

Collection device for lateral flow chromatography (United States Patent 6,998,273)

Selective fluoride and ammonia removal by chromatographic separation of wastewater (United States Patent 6,998,054)

Capillary column chromatography process and system (United States Patent 6,993,958)

Systems and methods for performing magnetic chromatography assays (United States Patent 6,991,912)

Automated capillary liquid chromatography small volume analysis system (United States Patent 6,989,129)

Methods for time-alignment of liquid chromatography-mass spectrometry data (United States Patent 6,989,100)

Chromatographic column seal (United States Patent 6,984,318)

Parallel detection chromatography systems (United States Patent 6,976,384)

Analyte pre-concentrator for gas chromatography (United States Patent 6,974,495)

Regeneration of chromatography material (United States Patent 6,972,327)

Composite chromatographic sorbent of mineral oxide beads with hydroxyapatite-filled pores (United States Patent 6,972,090)

Chromatographic or spectroscopic reports with hyperlinks to allow direct access to external references (United States Patent 6,971,059)

Detection of nucleic acid heteroduplex molecules by anion-exchange chromatography (United States Patent 6,969,587)

Methods and apparatus for packing chromatography columns and chromatography column (United States Patent 6,966,991)

Method and system for viewing chromatographic peaks over a network (United States Patent 6,961,072)

Chromatographic method for high yield purification and viral inactivation of antibodies (United States Patent 6,955,917)

Liquid chromatograph (United States Patent 6,955,760)

Method and device for vaporization injection of high volumes in gas chromatographic analysis (United States Patent 6,955,709)

Isolation of neurotrophins from a mixture containing neurotrophin variants using hydrophobic interaction chromatography (United States Patent 6,953,844)

Method for the gas chromatographic analysis of a sample, and analyzer (United States Patent 6,952,946)

Disposable chromatographic columns (United States Patent 6,949,194)

Methods and compositions for chromatography (United States Patent 6,942,804)

Removal of bacterial endotoxin in a protein solution by immobilized metal affinity chromatography (United States Patent 6,942,802)

High velocity chromatography column flow distributor (United States Patent 6,942,794)

Liquid chromatograph mass spectrometer (United States Patent 6,942,793)

Mixer for liquid chromatograph (United States Patent 6,942,792)

Median filter for liquid chromatography-mass spectrometry data (United States Patent 6,936,814)

Method for controlling an evaporative light scattering detector which is coupled to a liquid chromatography column (United States Patent 6,936,174)

System and method for performing multiple parallel chromatographic separations (United States Patent 6,936,167)

Endpiece for a chromatography column (United States Patent 6,936,166)

System for high throughput sample preparation and analysis using column chromatography (United States Patent 6,932,939)

Chromatographic device and method of forming a chromatographic device (United States Patent 6,932,904)

Vaporizer tube for vaporizing liquid samples in capillary gas chromatography (United States Patent 6,929,780)

High-affinity, low-molecular-mass displacers for ion-exchange chromatography (United States Patent 6,929,747)

Column packaging for chromatography (United States Patent 6,929,741)

Use of a weakly acid cation exchange resin for chromatographic separation of carbohydrates (United States Patent 6,924,371)

Liquid chromatograph pump and control method therefor (United States Patent 6,923,916)

Intake cross-sheets for gas chromatographic oven (United States Patent 6,920,777)

Apparatus and method for rapidly, eco-friendly sample preparation prior to chromatographic determination of chemical substances (United States Patent 7,152,459)

Device for automated coupling between a micro-chromatograph and a mass spectrometer comprising a temperature adjustment (United States Patent 7,148,475)

Microfabricated microconcentrator for sensors and gas chromatography (United States Patent 7,147,695)

Protein complex from ion-exchange chromatography for treatment of bacterial infections (United States Patent 7,144,855)

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.