Ritchie A. Wessling

Person

Berkeley, CA, US

People

Patents Grantslast 30 patents

Information Patent Grant
Gas separations utilizing glassy polymer membranes at sub-ambient t...
- Patent number 5,837,032
- Issue date Nov 17, 1998
- The Cynara Company
- David J. Moll
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Three-dimensional articles of lyotropic polymers and methods for th...
- Patent number 5,788,888
- Issue date Aug 4, 1998
- The Dow Chemical Company
- Arie Cohen
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Amphipathic graft copolymer pesticide formulation compositions and...
- Patent number 5,787,686
- Issue date Aug 4, 1998
- The Dow Chemical Company
- Craig J. Bott
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Amphipathic graft copolymer pesticide formulation compositions and...
- Patent number 5,753,248
- Issue date May 19, 1998
- The Dow Chemical Company
- Craig J. Bott
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Polyols having reduced terminal unsaturation and a process for prod...
- Patent number 5,736,748
- Issue date Apr 7, 1998
- The Dow Chemical Company
- Zenon Lysenko
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Gas separations utilizing glassy polymer membranes at sub-ambient t...
- Patent number 5,679,133
- Issue date Oct 21, 1997
- Dow Chemical Co.
- David J. Moll
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Process for the preparation of polybenzazole staple fiber
- Patent number 5,585,052
- Issue date Dec 17, 1996
- The Dow Chemical Company
- Chieh-Chun Chau
- D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
Information Patent Grant
Polybenzazole fibers having improved tensile strength retention
- Patent number 5,552,221
- Issue date Sep 3, 1996
- The Dow Chemical Company
- Ying H. So
- D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
Information Patent Grant
Stable concentrates and emulsions of water-insoluble organic pestic...
- Patent number 5,508,035
- Issue date Apr 16, 1996
- DowElanco
- Ritchie A. Wessling
- A01 - AGRICULTURE FORESTRY ANIMAL HUSBANDRY HUNTING TRAPPING FISHING
Information Patent Grant
Low heat release polymeric composites
- Patent number 5,490,967
- Issue date Feb 13, 1996
- The Dow Chemical Company
- Patrick H. Martin
- B32 - LAYERED PRODUCTS
Information Patent Grant
Low heat release polymeric composites
- Patent number 5,419,957
- Issue date May 30, 1995
- The Dow Chemical Company
- Patrick H. Martin
- B32 - LAYERED PRODUCTS
Information Patent Grant
Fire resistant panel
- Patent number 5,405,661
- Issue date Apr 11, 1995
- The Dow Chemical Company
- Peter K. Kim
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
Gas separations utilizing glassy polymer membranes at sub-ambient t...
- Patent number 5,352,272
- Issue date Oct 4, 1994
- The Dow Chemical Company
- David J. Moll
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Process of making microporous hollow fiber or film membrane of poly...
- Patent number 5,246,647
- Issue date Sep 21, 1993
- The Dow Chemical Company
- Henry N. Beck
- D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
Information Patent Grant
Xylylene based polyether membranes for gas separation
- Patent number 5,209,848
- Issue date May 11, 1993
- The Dow Chemical Company
- Thomas O. Jeanes
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Matrix composites in which the matrix contains polybenzoxazole or p...
- Patent number 5,196,259
- Issue date Mar 23, 1993
- The Dow Chemical Company
- Peter E. Pierini
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Stable concentrates and emulsions of water-insoluble organic pestic...
- Patent number 5,188,824
- Issue date Feb 23, 1993
- DowElanco
- Ritchie A. Wessling
- A01 - AGRICULTURE FORESTRY ANIMAL HUSBANDRY HUNTING TRAPPING FISHING
Information Patent Grant
Methods for synthesizing pulps and short fibers containing polybenz...
- Patent number 5,164,131
- Issue date Nov 17, 1992
- The Dow Chemical Company
- Chieh-Chun Chau
- D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
Information Patent Grant
Stable concentrates and emulsions of water-insoluble organic pestic...
- Patent number 5,089,259
- Issue date Feb 18, 1992
- DowElanco
- Ritchie A. Wessling
- A01 - AGRICULTURE FORESTRY ANIMAL HUSBANDRY HUNTING TRAPPING FISHING
Information Patent Grant
Polybenzazole polymers containing indan moieties
- Patent number 5,034,026
- Issue date Jul 23, 1991
- The Dow Chemical Company
- John D. Summers
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Microporous peek membranes and the preparation thereof
- Patent number 4,992,485
- Issue date Feb 12, 1991
- The Dow Chemical Company
- Ja-Young Koo
- D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
Information Patent Grant
Film, fiber, and microporous membranes of poly(etheretherketone)dis...
- Patent number 4,957,817
- Issue date Sep 18, 1990
- The Dow Chemical
- Chieh-Chun Chau
- D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
Information Patent Grant
Chlorine-stable membrane compositions
- Patent number 4,941,972
- Issue date Jul 17, 1990
- The Dow Chemical Company
- Jee I. Kau
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Enzyme immobilization with polysulfonium salts
- Patent number 4,929,556
- Issue date May 29, 1990
- The Dow Chemical Company
- Roberta C. Cheng
- C12 - BIOCHEMISTRY BEER SPIRITS WINE VINEGAR MICROBIOLOGY ENZYMOLOGY MUTATION...
Information Patent Grant
Ionic complex for enhancing performance of water treatment membranes
- Patent number 4,927,540
- Issue date May 22, 1990
- The Dow Chemical Company
- Ritchie A. Wessling
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Rejection enhancing coatings for reverse osmosis membranes
- Patent number 4,909,943
- Issue date Mar 20, 1990
- The Dow Chemical Company
- Richard F. Fibiger
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Porous filter media and membrane support means
- Patent number 4,904,385
- Issue date Feb 27, 1990
- The Dow Chemical Company
- Ritchie A. Wessling
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Rejection enhancing coatings for reverse osmosis membranes
- Patent number 4,894,165
- Issue date Jan 16, 1990
- The Dow Chemical Company
- Richard F. Fibiger
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Water-insoluble polymers from cyclic sulfonium compounds
- Patent number 4,885,355
- Issue date Dec 5, 1989
- The Dow Chemical Company
- Ritchie A. Wessling
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Preparation of asymmetric membranes by the solvent extraction of po...
- Patent number 4,868,222
- Issue date Sep 19, 1989
- The Dow Chemical Company
- Chieh-Chun Chau
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...

Ritchie A. Wessling

Person

Patents Grantslast 30 patents

Gas separations utilizing glassy polymer membranes at sub-ambient t...

Three-dimensional articles of lyotropic polymers and methods for th...

Amphipathic graft copolymer pesticide formulation compositions and...

Amphipathic graft copolymer pesticide formulation compositions and...

Polyols having reduced terminal unsaturation and a process for prod...

Gas separations utilizing glassy polymer membranes at sub-ambient t...

Process for the preparation of polybenzazole staple fiber

Polybenzazole fibers having improved tensile strength retention

Stable concentrates and emulsions of water-insoluble organic pestic...

Low heat release polymeric composites

Low heat release polymeric composites

Fire resistant panel

Gas separations utilizing glassy polymer membranes at sub-ambient t...

Process of making microporous hollow fiber or film membrane of poly...

Xylylene based polyether membranes for gas separation

Matrix composites in which the matrix contains polybenzoxazole or p...

Stable concentrates and emulsions of water-insoluble organic pestic...

Methods for synthesizing pulps and short fibers containing polybenz...

Stable concentrates and emulsions of water-insoluble organic pestic...

Polybenzazole polymers containing indan moieties

Microporous peek membranes and the preparation thereof

Film, fiber, and microporous membranes of poly(etheretherketone)dis...

Chlorine-stable membrane compositions

Enzyme immobilization with polysulfonium salts

Ionic complex for enhancing performance of water treatment membranes

Rejection enhancing coatings for reverse osmosis membranes

Porous filter media and membrane support means

Rejection enhancing coatings for reverse osmosis membranes

Water-insoluble polymers from cyclic sulfonium compounds

Preparation of asymmetric membranes by the solvent extraction of po...