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Patents Grants
last 30 patents
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Patent Grant
Cationic copolymer and use thereof in lost circulation additive
Patent number
10,266,617
Issue date
Apr 23, 2019
China Petroleum and Chemical Corporation
Changming Su
C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Patents Applications
last 30 patents
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Patent Application
CATIONIC COPOLYMER AND USE THEREOF IN LOST CIRCULATION ADDITIVE
Publication number
20160200848
Publication date
Jul 14, 2016
China Petroleum and Chemical Corporation
Changming SU
C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...