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:
Jun. 13, 1978
Filed:
May. 17, 1976
Michael Edward Jones, Runcorn, EN;
Imperial Chemical Industries Limited, London, EN;
Abstract
A polyaryl sulphone made from a reagent of the formulae H--Ar--SO.sub.2.X and/or an equimolar mixture of reagents of the formulae X.SO.sub.2 --Ar--SO.sub.2.X and H--Ar--H, where X is a halogen atom and Ar is a bivalent aromatic radical, tends to suffer from an increase in the viscosity of the melt due to decomposition of terminal sulphonyl halide groups. A polymeric material containing no sulphonyl halide groups is obtained therefrom by reacting the polymer in solution with an organic compound such as aniline or diphenyl ether which will react with sulphonyl halide groups in the polymer to produce groups which are stable at temperatures at which the polymer is molten.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile