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:
Mar. 22, 2005
Filed:
Apr. 22, 2003
Ralph M. Aten, Chadds Ford, PA (US);
Sharon Ann Libert, Hockessin, DE (US);
Ralph M. Aten, Chadds Ford, PA (US);
Sharon Ann Libert, Hockessin, DE (US);
E. I. du Pont de Nemours and Company, Wilmington, DE (US);
Abstract
Modified polytetrafluoroethylene powder of a sinterable copolymer of tetrafluoroethylene containing about 0.5 to about 10 weight % of fluorinated vinyl ether, the copolymer having a melt creep viscosity of greater than about 1×10Pa·S. In preferred embodiments, the sinterable copolymer has a melt creep viscosity of greater than about 1×10Pa·S and fluorinated vinyl ether content of from about 1 to about 7 weight %. The polymer has a combination of a high level of fluorinated vinyl ether and a melt creep viscosity which is high enough to enable the fabrication of articles by sintering.