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Thomas R. Sifferman
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Plano, TX, US
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last 30 patents
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Patent Grant
pH tolerant heteropolysaccharide gels for use in profile control
Patent number
5,277,830
Issue date
Jan 11, 1994
Mobil Oil Corporation
Dennis H. Hoskin
E21 - EARTH DRILLING MINING
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Patent Grant
Method for imparting selectivity to polymeric gel systems
Patent number
5,156,214
Issue date
Oct 20, 1992
Mobil Oil Corporation
Dennis H. Hoskin
E21 - EARTH DRILLING MINING