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:
May. 30, 1978
Filed:
Feb. 14, 1977
Applicant:
Inventors:
Alexander George Lowe, Reading, EN;
Philip Edward Derbyshire, Little Sandhurst, near Camberley, EN;
Andrew George Papay, Manchester, MO (US);
Assignee:
Edwin Cooper and Company Limited, Bracknell, EN;
Primary Examiner:
Int. Cl.
CPC ...
C07F / ;
U.S. Cl.
CPC ...
2604299 ; 252 / ;
Abstract
Zinc dihydrocarbyldithiophosphates are made by the reaction of zinc oxide with dihydrocarbyldithiophosphoric acid in the presence of mineral oil which has been reacted with nitrogen dioxide. The nitrogen dioxide treatment alters the oil such that it promotes the zinc oxide reaction. The process is especially adapted for making zinc dialkaryldithiophosphates useful as lubricating oil additives.