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:
Jun. 22, 1976
Filed:
Dec. 19, 1974
Applicant:
Inventors:
David J St Clair, Bethalto, IL (US);
Ronald K Crossland, Manhattan Beach, CA (US);
Assignee:
Shell Oil Company, Houston, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C10M / ;
U.S. Cl.
CPC ...
252 59 ;
Abstract
Lubricating compositions having improved operating life comprise lubricants containing hydrogenated polymers of conjugated dienes wherein at least 98% of the olefinic double bonds present in the non-hydrogenated precursors are reduced and at least 20% of the polymeric molecules contain no olefinic double bonds in the polymer backbone.