Donald L. Tomkinson

Person

Bay City, MI, US

People

Patents Grantslast 30 patents

Information Patent Grant
Method of in-mold sulfonation of molded plastic article
- Patent number 5,030,399
- Issue date Jul 9, 1991
- The Dow Chemical Company
- Wilhelm E. Walles
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Controlled-release compositions for acids
- Patent number 4,923,753
- Issue date May 8, 1990
- The Dow Chemical Company
- Wilhelm E. Walles
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
Apparatus for the generation of sulfur trioxide reagent and sulfona...
- Patent number 4,915,912
- Issue date Apr 10, 1990
- The Dow Chemical Company
- Wilhelm E. Walles
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Process for the generation of sulfur trioxide reagent and sulfonati...
- Patent number 4,902,493
- Issue date Feb 20, 1990
- The Dow Chemical Company
- Wilhelm E. Walles
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Mold sulfonation system
- Patent number 4,861,250
- Issue date Aug 29, 1989
- The Dow Chemical Company
- Wilhem E. Walles
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Controlled-release composition having a membrane comprising submicr...
- Patent number 4,756,844
- Issue date Jul 12, 1988
- The Dow Chemical Company
- Wilhelm E. Walles
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
Method for treating subterranean formations
- Patent number 4,741,401
- Issue date May 3, 1988
- The Dow Chemical Company
- Wilhelm E. Walles
- E21 - EARTH DRILLING MINING
Information Patent Grant
Polymerization method employing tubular reactor
- Patent number 4,046,718
- Issue date Sep 6, 1977
- The Dow Chemical Company
- Robert O. Mass
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL

Donald L. Tomkinson

Person

Patents Grantslast 30 patents

Method of in-mold sulfonation of molded plastic article

Controlled-release compositions for acids

Apparatus for the generation of sulfur trioxide reagent and sulfona...

Process for the generation of sulfur trioxide reagent and sulfonati...

Mold sulfonation system

Controlled-release composition having a membrane comprising submicr...

Method for treating subterranean formations

Polymerization method employing tubular reactor