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. 09, 1976
Filed:
Sep. 26, 1974
Applicant:
Inventor:
Richard Donnan Livingston, Seaford, DE (US);
Assignee:
E. I. Du Pont de Nemours and Company, Wilmington, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08K / ; C08G / ;
U.S. Cl.
CPC ...
260 / ; 5714 / ; 260 / ; 260 / ; 260 / ; 260 / ;
Abstract
Yarns of good color characterized by a high capability of being deeply dyed with acid dyes are spun from copolyamides having a relative viscosity of 35-75, an amine end concentration of 35-80 gram equivalents per 10.sup.6 grams of polymer and a defined content of units formed in part from N,N'-di(3-aminopropyl)piperazine and which have been produced with the introduction of a defined content of a specified organic phosphorous compound prior to extrusion of the polymer.