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Eugen R. Werlein
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Simonton, TX, US
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last 30 patents
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Low and high temperature drilling fluids based on sulfonated terpol...
Patent number
4,978,461
Issue date
Dec 18, 1990
Exxon Research and Engineering Company
Dennis G. Peiffer
C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...