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Richard A. Widdifield
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Niagara Falls, CA
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last 30 patents
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Patent Grant
Method for providing improved colloidal stability and polyvinyl chl...
Patent number
4,957,983
Issue date
Sep 18, 1990
The B. F. Goodrich Company
Roman B. Hawrylko
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...