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:
Mar. 28, 1978
Filed:
May. 06, 1976
Applicant:
Inventor:
Adrian Richardson, Hull, EN;
Assignee:
Orobis Limited, London, EN;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C10M / ;
U.S. Cl.
CPC ...
252 59 ;
Abstract
A composition suitable as a V.I. improver additive for lubricants comprising from 1 to 15% of a vinyl aromatic sequential block copolymer having an M.sub.n in the range 25,000 to 125,000 and containing from 10 to 40% b.w. of the vinyl aromatic component, from 5 to 45% of a polybutene having an M.sub.n in the range 5,000 to 60,000 and the remainder of the composition comprising a solvent neutral base oil, all percentages being by weight.