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:
Aug. 17, 1976
Filed:
Mar. 17, 1975
John Scotchford Elliott, Beaconsfield, EN;
Bryan Terence Davis, Wakingham, EN;
Monty Frederick Crook, Binfield, EN;
Edwin Cooper & Company Limited, Bracknell, EN;
Abstract
A heterocyclic phosphorus mono-, di- or polyester has the constitution of the product prepared by reacting an intermediate of specified type with a di- or polyol or derivative thereof capable of yielding the di- or polyol on hydrolysis, said intermediate of specified type being a heterocyclic phosphorus compound having the constitution of the compound prepared by reacting an olefin polymer or copolymer having at least 50 carbon atoms and containing olefinic unsaturation with a phosphorus trihalide in the presence of a Friedel-Crafts catalyst, preferably consisting of an aluminium halide, to form a reaction product having halogen atoms attached to phosphorus, and thereafter reacting the reaction product with a hydroxy compound, preferably water or methanol, to remove one or both of the halogen atoms attached to the phosphorus atom. Lubricating compositions containing the mono-, di- or polyesters of the invention are also described.