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David L. Williams
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Richmond, VA, US
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last 30 patents
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Patent Grant
Smoking compositions containing a 2,5-diacylpyrazine flavorant addi...
Patent number
5,017,235
Issue date
May 21, 1991
Philip Morris Inc.
David L. Williams
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Novel process for the production of 4,6-dimethyl-7-hydroxynonan-3-one
Patent number
4,925,985
Issue date
May 15, 1990
Philip Morris Incorporated
David L. Williams
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Process for preparing acylpyrazine ethers
Patent number
4,859,775
Issue date
Aug 22, 1989
Philip Morris Incorporated
David L. Williams
A23 - FOODS OR FOODSTUFFS THEIR TREATMENT, NOT COVERED BY OTHER CLASSES
Information
Patent Grant
Smoking compositions containing acylpyrazine ether flavorants
Patent number
4,728,738
Issue date
Mar 1, 1988
Philip Morris Incorporated
David L. Williams
A23 - FOODS OR FOODSTUFFS THEIR TREATMENT, NOT COVERED BY OTHER CLASSES
Information
Patent Grant
Smoking composition containing a novel monoacylpyrazine flavorant
Patent number
4,635,652
Issue date
Jan 13, 1987
Philip Morris Incorporated
Yoram Houminer
A23 - FOODS OR FOODSTUFFS THEIR TREATMENT, NOT COVERED BY OTHER CLASSES
Information
Patent Grant
1-pyrazinyl-1-propanone derivatives useful as flavorants in smoking...
Patent number
4,588,813
Issue date
May 13, 1986
Philip Morris Incorporated
Yoram Houminer
A23 - FOODS OR FOODSTUFFS THEIR TREATMENT, NOT COVERED BY OTHER CLASSES
Information
Patent Grant
Smoking compositions containing acylpyrazine ether flavorants
Patent number
4,535,791
Issue date
Aug 20, 1985
Philip Morris Incorporated
David L. Williams
A23 - FOODS OR FOODSTUFFS THEIR TREATMENT, NOT COVERED BY OTHER CLASSES
Information
Patent Grant
Smoking compositions containing novel acylpyrazine flavorants
Patent number
4,481,957
Issue date
Nov 13, 1984
Philip Morris, Incorporated
David L. Williams
C07 - ORGANIC CHEMISTRY