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:
Jul. 05, 1977
Filed:
Oct. 18, 1976
Applicant:
Inventor:
Thomas E Kiovsky, Houston, TX (US);
Assignee:
Shell Oil Company, Houston, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C10M / ;
U.S. Cl.
CPC ...
252 / ; 2608 / ;
Abstract
Lubricating oil additives having both dispersant and viscosity-index improving properties are prepared by reacting a block copolymer with maleic anhydride and an alkane polyol. The block copolymer has the general configuration A-B wherein A is a monoalkenyl arene block and B is a selectively hydrogenated conjugated diene block having between 75 and 98 percent hydrogenated double bonds.
Kiovsky, Thomas. (1977). Dispersant vi improver (U.S. Patent No. 4033888). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4033888
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile