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. 24, 1992
Filed:
Apr. 11, 1990
Applicant:
Inventor:
John C Chang, St. Paul, MN (US);
Assignee:
Other;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B32B / ; B32B / ; B32B / ; C09B / ;
U.S. Cl.
CPC ...
428267 ; 8560 ; 8929 ; 428 96 ; 428395 ;
Abstract
Compositions comprising normally solid, water-soluble divalent metal salts of partially sulfonated novolak resins are provided. These divalent salts of partially sulfonated novolak resins ae useful for imparting to fibrous polyamide materials stain resistance to natural and synthetic acid colorants. Also provided are methods of preparing these resins, methods of treating fibrous polyamide materials with these resins, and fibrous polyamide materials so treated.