The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 28, 1985
Filed:
Apr. 03, 1984
Applicant:
Inventors:
Assignee:
Dai-Ichi Kogyo Seiyaku Co., Ltd., Kyoto, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C09K / ;
U.S. Cl.
CPC ...
252 / ; 252 / ;
Abstract
A fluid composition suitable for use in drilling containing a sulfoethylcellulose alkali metal salt of which a degree of substitution is from 0.5 to 2.5 and the viscosity of a 1% by weight aqueous solution is 5 to 5,000 cP. The sulfoethylcellulose alkali metal salt has excellent water loss reducing ability and viscosity building ability and is soluble and stable in the presence of any monovalent and polyvalent salts at a wide pH range, and is applicable as a high molecular additive to a drilling mud and a completion fluid.
Quick Actions:
Hori, Yuji. (1985). Fluid composition for drilling (U.S. Patent No. 4519923). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4519923
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