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David K. Olsen
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Bartlesville, OK, US
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last 30 patents
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Patent Grant
Method for modifying the permeability of an underground formation
Patent number
5,101,903
Issue date
Apr 7, 1992
Akzo nv
Feliciano M. Llave
C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
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Patent Grant
Oxidized alkali lignins and their use in enhanced oil recovery
Patent number
4,611,659
Issue date
Sep 16, 1986
Getty Oil Company
Francis E. DeBons
C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...