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. 09, 2007
Filed:
May. 29, 2002
John Neil Devine, Lancashire, GB;
Stuart Green, Lancashire, GB;
David John Kemmish, Lancashire, GB;
Brian Wilson, Lancashire, GB;
John Neil Devine, Lancashire, GB;
Stuart Green, Lancashire, GB;
David John Kemmish, Lancashire, GB;
Brian Wilson, Lancashire, GB;
Victrex Manufacturing Limited, Thornton Clevelays, GB;
Abstract
Method of purifying a polymeric material of a type which includes (A) phenyl moieties; (B) carbonyl and/or sulphone moieties; and; (C) ether and/or thioether moieties. The method includes contacting the polymeric material with a solvent formulation which is at a temperature of greater than 100° C. and a pressure above ambient pressure thereby to charge the solvent formulation with impurities derived from the polymeric material, and separating the charged solvent from the polymeric material.