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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.:

US 4945989 B1

PDFFull Text
Date of Patent:
Aug. 07, 1990

Filed:

Dec. 28, 1987

Polymer containing pendant tertiary alkyl amine groups useful in

Applicant:
Inventors:

Cyrus A Irani, Houston, TX (US);

Thomas V Harris, Benicia, CA (US);

Wayne R Pretzer, Wheaton, IL (US);

Assignee:

Chevron Research Company, San Francisco, CA (US);

Attorneys:

Keeling; E. J.

Schaal; E. A.

Primary Examiner:

George A Suchfield

Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
166268 ; 166273 ; 166274 ; 252-8554 ;
Abstract

A polymer having pendant tertiary alkyl amine groups is disclosed having a minimum solubility parameter of 6.85 (cal/cc).sup.1/2 or less. That minimum solubility parameter is reduced to 6.85 (cal/cc).sup.1/2 or less by control of the number of pendant tertiary alkyl amine groups and by the selection of said tertiary alkyl amine groups. The polymer can be formed by reacting either polyglycol (such as polypropylene glycol) or a polyolefin (such as polybutadiene) with a secondary amine, such as diisobutylamine.

Find Patent Forward Citations

Irani, Cyrus. (1990). Polymer containing pendant tertiary alkyl amine groups useful in (U.S. Patent No. 4945989). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4945989

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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