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. 29, 1986
Filed:
Nov. 01, 1984
Applicant:
Inventors:
Xuan T Phan, Lancaster, PA (US);
Paul J Shannon, Millersville, PA (US);
Anne L Schwartz, Columbia, PA (US);
Assignee:
Armstrong World Industries, Inc., Lancaster, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
525420 ; 811558 ; 811564 ; 528323 ; 811568 ; 528336 ;
Abstract
A method for producing a differentially dyeable polyamide is disclosed. The method comprises selectively reacting a polyamide's free amines with an N-halogenating agent. Polyamides produced according to the process of this invention will have distinct areas thereon that show varying degrees of receptivity to acid dyes and can thereby be differentially dyed using a single dyebath.