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:
Nov. 10, 1992
Filed:
Feb. 21, 1990
Applicant:
Inventors:
Charles Cane, North Humberside, GB;
David A Duncan, West Yorkshire, GB;
Sean P O'Connor, North Humberside, GB;
Assignee:
BP Chemicals (Additives) Limited, London, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C10M / ;
U.S. Cl.
CPC ...
252 18 ; 252 39 ; 252 427 ;
Abstract
A process for the preparation of lubricating oil additive concentrate having a TBN greater than 300 comprises reacting at elevated temperature