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:
Nov. 17, 2009
Filed:
Apr. 19, 2006
Clay Woodward Jones, Washington, WV (US);
Robert John Cavanaugh, Cincinnati, OH (US);
Walter Thomas Krakowiak, Wilmington, DE (US);
Richard A. Morgan, Vienna, WV (US);
Theodore A. Treat, Washington, WV (US);
Clay Woodward Jones, Washington, WV (US);
Robert John Cavanaugh, Cincinnati, OH (US);
Walter Thomas Krakowiak, Wilmington, DE (US);
Richard A. Morgan, Vienna, WV (US);
Theodore A. Treat, Washington, WV (US);
E. I. du Pont de Nemours and Company, Wilmington, DE (US);
Abstract
An aqueous dispersion of non-melt-processible fluoropolymer, process for making same and concentrated dispersion and powder obtained from the dispersion. The fluoropolymer particles of the dispersion have a standard specific gravity (SSG) of less than 2.225 and comprise a core of high molecular weight polytetrafluoroethylene and a shell of lower molecular weight polytetrafluoroethylene or modified polytetrafluoroethylene. At least about 1.5 weight % of the fluoropolymer particles comprise substantially rod-shaped particles having a length to diameter ratio greater than about 5.