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. 19, 2012
Filed:
Mar. 27, 2006
Applicant:
Christopher William Newton, Richmond, VA (US);
Inventor:
Christopher William Newton, Richmond, VA (US);
Assignees:
E.I. du Pont de Nemours and Company, Wilmington, DE (US);
Magellan Systems International, LLC, Richmond, VA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F 6/00 (2006.01); C08G 63/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
The invention concerns processes for hydrolyzing polyphosphoric acid in a never-dried spun multifilament yarn, comprising: a) removing surface liquid from filaments in a never-dried spun multifilament yarn; and b) contacting the yarn with a hot surface to hydrolyze polyphosphoric acid, wherein the filaments remain substantially unfused; wherein the hot surface has a surface temperature of at least about 150° C.