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:
Jul. 23, 1996
Filed:
Sep. 30, 1993
Applicant:
Inventor:
Tahir Iqbal, Waynesboro, VA (US);
Assignee:
E. I. Du Pont de Nemours and Company, Wilmington, DE (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08K / ; D06M / ; D06M / ; D06M / ;
U.S. Cl.
CPC ...
524394 ; 811551 ; 811554 ; 811564 ; 811568 ; 524395 ; 524420 ; 524590 ; 524773 ; 524775 ; 524777 ; 524871 ; 528906 ;
Abstract
An alkali metal salt additive in very low concentration in spandex (e.g., 0.02-0.25%) increases the heat set efficiency of spandex. The anion of the salt is a carboxylate having 1 to 10 carbon atoms or thiocyanate.