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. 31, 1978
Filed:
Aug. 13, 1976
Applicant:
Inventor:
James T Edmonds, Jr, Bartlesville, OK (US);
Assignee:
Phillips Petroleum Company, Bartlesville, OK (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F / ;
U.S. Cl.
CPC ...
260 79 ; 260 / ; 260 / ; 260 791 ;
Abstract
Arylene sulfide polymers containing ash-forming impurities or materials are purified by heating such polymers with an organic amide and an alkali metal salt selected from carboxylates, carbonates, and selected lithium halides under conditions sufficient to reduce the ash-forming impurities without extensive polymer degradation.