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:
Jan. 04, 1994
Filed:
Feb. 03, 1992
Applicant:
Inventors:
Margaret M Wu, Skillman, NJ (US);
Alice S Chu, Spotswood, NJ (US);
Assignee:
Mobil Oil Corporation, Fairfax, VA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C10L / ;
U.S. Cl.
CPC ...
585 12 ; 585 10 ; 585 11 ; 585 17 ; 585 19 ; 585411 ; 585452 ; 208 18 ; 208 19 ;
Abstract
Liquid hydrocarbon lubricant viscosity index improver compositions are disclosed having high shear stability. The compositions comprise the homopolymer or copolymer product of the oligomerization of C.sub.3 to C.sub.5 alpha-olefin or mixtures thereof, with or without ethylene as co-monomer. The process is carried out under oligomerization conditions in contact with a reduced valence state Group VIB metal catalyst on porous support. The viscosity index improver of the invention has a regio-irregularity of at least 20%, weight average molecular weight between 6,000 and 30,000 and molecular weight distribution between 2 and 5.