Hilda Howell

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Pittsburgh, PA, US

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Patents Grantslast 30 patents

Information Patent Grant
Non-free-amine promoter system for polyester composition
- Patent number 4,325,841
- Issue date Apr 20, 1982
- Koppers Company, Inc.
- Hilda Howell
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Method for treating polyester resin system with organic acid to sup...
- Patent number 4,304,878
- Issue date Dec 8, 1981
- Koppers Company, Inc.
- Hilda Howell
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Polyester composition stabilized against gel-time drift with amine...
- Patent number 4,267,279
- Issue date May 12, 1981
- Koppers Company, Inc.
- Hilda Howell
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...