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:
Apr. 28, 1992
Filed:
Dec. 14, 1988
Applicant:
Inventors:
Anthony Anton, Wilmington, DE (US);
Peter R Witt, Lugoff, SC (US);
Linda H Sauerbrunn, Wilmington, DE (US);
Diane M Scholler, Wilmington, DE (US);
William P Parmelee, Seaford, DE (US);
William T Windley, Seaford, DE (US);
Paul S Pearlman, Thornton, PA (US);
Assignee:
E. I. Du Pont de Nemours and Company, Wilmington, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D01F / ;
U.S. Cl.
CPC ...
2641761 ; 264 75 ; 264211 ;
Abstract
Process for producing producer-colored nylon fibers which are stain-resistant to acid dyes are made by adding pigment to nylon copolymers containing 0.25-4.0 percent by weight of an aromatic sulfonate or an alkali metal salt thereof.