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:
Feb. 09, 1999
Filed:
Sep. 08, 1997
Applicant:
Inventors:
Allan S Hay, Montreal, Quebec H3W 2B3, CA;
Yifeng Wang, Montreal, Quebec H3W 1N3, CA;
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
528389 ; 528377 ; 528378 ; 528387 ;
Abstract
A polyarylene sulfide free of inorganic contaminants, especially residues of inorganic polymerization catalysts, is produced by the free radical, ring-opening polymerization of a cyclic thioether.