Inventor

Ritchie A. Wessling

Inventor

Midland, MI, US

Overview

86→

Patents

1976–2017

Patent span

Chemistry

Primary field (CPC C)

Patents· 86 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

B01Dprimary

B01DSeparation10%

Y10TTechnical subjects covered by former us classification10%

C08FMacromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds9%

G01NInvestigating or analysing materials by determining their chemical or physical properties8%

C08GMacromolecular compounds obtained otherwise than by reactions only involving unsaturated carbon-to-carbon bonds6%

C09DCoating compositions, e.g. paints, varnishes or lacquers5%

C08JWorking-up4%

C07DHeterocyclic compounds4%

C07FAcyclic, carbocyclic or heterocyclic compounds containing elements other than carbon, hydrogen, halogen, oxygen, nitrogen, sulfur, selenium or tellurium4%

C09KMaterials for miscellaneous applications, not provided for elsewhere4%

PatentTitleYear

9,839,378'Optical systems and methods for ratiometric measurement of blood glucose concentration'2017 8,983,565'Optical determination of pH and glucose'2015 8,951,503'Optical determination of glucose utilizing boronic acid adducts'2015 8,940,544'Antioxidant protection of a chemical sensor'2015 8,838,195'Optical systems and methods for ratiometric measurement of blood glucose concentration'2014 8,658,795'Pyridinium boronic acid quenchers for use in analyte sensors'2014 8,498,682'Optical determination of pH and glucose'2013 8,394,357'Optical determination of glucose utilizing boronic acid adducts'2013 8,178,676'Pyridinium boronic acid quenchers for use in analyte sensors'2012 8,110,251'Method for polymerizing a monomer solution within a cavity to generate a smooth polymer surface'2012 7,968,714'Optical determination of glucose utilizing boronic acid adducts'2011 7,939,664'Pyridinium boronic acid quenchers for use in analyte sensors'2011 7,829,341'Polyviologen boronic acid quenchers for use in analyte sensors'2010 7,751,863'Optical determination of ph and glucose'2010 7,470,420'Optical determination of glucose utilizing boronic acid adducts'2008 6,653,141'Polyhydroxyl-substituted organic molecule sensing method and device'2003 6,627,177'Polyhydroxyl-substituted organic molecule sensing optical in vivo method utilizing a boronic acid adduct and the device thereof'2003 5,837,032'Gas separations utilizing glassy polymer membranes at sub-ambient temperatures'1998 5,788,888'Three-dimensional articles of lyotropic polymers and methods for the preparation'1998 5,787,686'Amphipathic graft copolymer pesticide formulation compositions and methods of their use'1998 5,753,248'Amphipathic graft copolymer pesticide formulation compositions and methods of their use'1998 5,736,748'Polyols having reduced terminal unsaturation and a process for producing same'1998 5,679,133'Gas separations utilizing glassy polymer membranes at sub-ambient temperatures'1997 5,585,052'Process for the preparation of polybenzazole staple fiber'1996 5,552,221'Polybenzazole fibers having improved tensile strength retention'1996 5,508,035'Stable concentrates and emulsions of water-insoluble organic pesticides'1996 5,490,967'Low heat release polymeric composites'1996 5,419,957'Low heat release polymeric composites'1995 5,405,661'Fire resistant panel'1995 5,352,272'Gas separations utilizing glassy polymer membranes at sub-ambient temperatures'1994 5,246,647'Process of making microporous hollow fiber or film membrane of poly(phenylene sulfide) (PPS)'1993 5,209,848'Xylylene based polyether membranes for gas separation'1993 5,196,259'Matrix composites in which the matrix contains polybenzoxazole or polybenzothiazole'1993 5,188,824'Stable concentrates and emulsions of water-insoluble organic pesticides'1993 5,164,131'Methods for synthesizing pulps and short fibers containing polybenzazole polymers'1992 5,089,259'Stable concentrates and emulsions of water-insoluble organic pesticides'1992 5,034,026'Polybenzazole polymers containing indan moieties'1991 4,992,485'Microporous peek membranes and the preparation thereof'1991 4,957,817'Film, fiber, and microporous membranes of poly(etheretherketone)dissolved in high boiling point polar organic solvents'1990 4,941,972'Chlorine-stable membrane compositions'1990 4,929,556'Enzyme immobilization with polysulfonium salts'1990 4,927,540'Ionic complex for enhancing performance of water treatment membranes'1990 4,909,943'Rejection enhancing coatings for reverse osmosis membranes'1990 4,904,385'Porous filter media and membrane support means'1990 4,894,165'Rejection enhancing coatings for reverse osmosis membranes'1990 4,885,355'Water-insoluble polymers from cyclic sulfonium compounds'1989 4,868,222'Preparation of asymmetric membranes by the solvent extraction of polymer components from polymer blends'1989 4,859,339'Microporous membranes of syndiotactic vinylaromatic polymers'1989 4,859,384'Novel polyamide reverse osmosis membranes'1989 4,839,203'Semi-permeable membranes prepared via reaction of cationic groups with nucleophilic groups'1989 4,828,700'Rejection enhancing coatings for reverse osmosis membranes'1989 4,806,439'Temporary barrier layer in batteries'1989 4,797,456'Aqueous-dispersible cyclic sulfonium compounds that cure to form water-insoluble polymers'1989 4,797,187'Semi-permeable membranes prepared via reaction of cationic groups with nucleophilic groups'1989 4,769,148'Novel polyamide reverse osmosis membranes'1988 4,704,324'Semi-permeable membranes prepared via reaction of cationic groups with nucleophilic groups'1987 4,654,100'Method for preparing random-fiber thermoset composites'1987 4,643,940'Low density fiber-reinforced plastic composites'1987 4,528,384'Addition polymerizable aromatic sulfonium salts and polymers thereof'1985 4,525,526'Surface active polymeric surfactants containing side chain hydrophobes'1985 4,477,640'Addition polymerizable aromatic sulfonium salts and polymers thereof'1984 4,444,977'Curable oxirane formulations'1984 4,431,768'Aqueous compositions containing organic polymers curable at low temperatures in the wet state'1984 4,427,819'Anionic structured particle latexes'1984 4,426,489'Surface active polymeric surfactants containing side chain hydrophobes'1984 4,426,470'Aqueous method of making reinforced composite material from latex, solid polymer and reinforcing material'1984 4,383,073'Cationic resin curable with acid catalyzed cross-linkers'1983 4,352,766'Scrapless forming of plastic articles'1982 4,337,185'Process for making cationic structured particle latexes using reactive polymeric surfactants'1982 4,323,531'Process for forming a plastic article'1982 4,225,407'Cathodic electrodeposition of polymers onto a conductive surface'1980 4,225,406'Cationic deposition of polymers onto a conductive surface'1980 4,214,096'Novel isothiouronium salts'1980 4,189,345'Fibrous compositions'1980 4,187,142'Method for forming high strength composites'1980 4,178,205'High strength non-woven fibrous material'1979 4,161,502'Process for forming plastic articles'1979 4,113,710'Process for preparing substantially linear water-soluble interpolymeric interfacially spreading polyelectrolytes'1978 4,056,501'Cationic structured-particle latexes'1977 4,017,442'Structured-particle latexes'1977 4,017,372'Process for electrodeposition of cross-linked polymer coatings'1977 4,002,586'Method for preparing cationic latexes'1977 3,998,776'Isothiouronium stabilized latexes'1976 3,994,792'Electrodeposition of sulfoxonium stabilized colloids'1976 3,967,928'Method for quantitatively analyzing substances containing elements other than carbon, hydrogen and oxygen and volatile organic compounds'1976 3,965,032'Colloidally stable dispersions'1976

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1976–1998Patents assigned to DOW CHEMICAL CO (65)· patent assignee history

1976–1998Based in Midland, MI, US· patent location history

1990–1997Based in Berkeley, CA, US· patent location history

2003–2015Patents assigned to UNIV CALIFORNIA (6)· patent assignee history

2003–2017Based in Watsonville, CA, US· patent location history

2010–2014Patents assigned to GLUMETRICS INC (7)· patent assignee history

2012–2015Patents assigned to WESSLING RITCHIE A (8)· patent assignee history

2014–2017Patents assigned to MEDTRONIC MINIMED INC (4)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
DOW CHEMICAL CO	65	1976–1998
WESSLING RITCHIE Aself	8	2012–2015
GLUMETRICS INC	7	2010–2014
UNIV CALIFORNIA	6	2003–2015
MEDTRONIC MINIMED INC	4	2014–2017

Locations

Location	Patents	Span
Midland, MI, US	56	1976–1998
Watsonville, California, US	17	2003–2017
Berkeley, California, US	13	1990–1997