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. 21, 2005
Filed:
Feb. 09, 2001
David John Kemmish, Preston, GB;
Brian Wilson, Garstang, GB;
David John Kemmish, Preston, GB;
Brian Wilson, Garstang, GB;
Victrex Manufacturing Limited, Thornton Cleveleys, GB;
Abstract
The invention relates to polyetherketones and to a process for the preparation of aromatic polyetherketones which process comprises: a) self-condensing a compound of formula (I) wherein n represents 0 or 1 in the presence of an alkyl or optionally substituted aryl sulphonic acid solvent and in the absence of phosphorous pentoxide; or b) condensing a compound of general formula (II) and a compound of general formula (III) wherein p and q independently represent 0 or 1, in the presence of an alkyl or optionally substituted aryl sulphonic acid solvent and in the absence of phosphorous pentoxide; or c) a combination of a) and b)