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:
Aug. 05, 2008
Filed:
Jun. 26, 2002
Applicant:
Philip J. Brown, Williamson, SC (US);
Inventor:
Philip J. Brown, Williamson, SC (US);
Assignee:
Victrex Manufacturing Limited, Tornton Cleveleys, Lancashire, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29C 65/00 (2006.01); C08G 8/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
Membranes comprising an aromatic ether ketone polymer (e.g. polyetherketone) in sheet or hollow fibre form are made by preparing at least a 12 wt % solution of the polymer in a solvent which is chemically inert to the polymer (e.g. concentrated sulphuric acid); forming a film of the solution in sheet or hollow form; and contacting the film with a non-solvent (e.g. more dilute sulphuric acid or acetic acid) thereby to precipitate the film.