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:
Sep. 27, 2011
Filed:
Nov. 12, 2009
Nobuyuki Kasahara, Chiyoda-ku, JP;
Noriaki Miyake, Chiyoda-ku, JP;
Nobuyuki Kasahara, Chiyoda-ku, JP;
Noriaki Miyake, Chiyoda-ku, JP;
Asahi Glass Company, Limited, Tokyo, JP;
Abstract
To provide a process for efficiently producing a perfluoropolymer having unstable terminal groups reduced. A process for producing a fluorination-treated perfluoropolymer, which comprises melting a thermoplastic perfluoropolymer to form strands and contacting the polymer strands with a fluorine gas. For fluorination-treatment of the perfluoropolymer, an apparatusis used, which comprises a melt extruderfor melting and extruding the perfluoropolymer, a diefor forming the melt extruded polymer into continuous strandsand a fluorination tankfor contacting the continuous strandswith a fluorine gas.