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. 31, 1998
Filed:
Feb. 18, 1997
Applicant:
Inventor:
Alain Lauton, Saint-Louis, FR;
Assignee:
Ciba Specialty Chemicals Corporation, Tarrytown, NY (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C14C / ; C14C / ;
U.S. Cl.
CPC ...
8 9433 ; 8 9415 ; 8 9418 ; 8 942 ; 8 9421 ; 8 9423 ; 252-857 ;
Abstract
An aqueous composition for the pretanning of hide pelts or for the retanning of leather comprises (A) an aliphatic dialdehyde containing 2 to 8 carbon atoms, (B) an anionic aromatic tanning agent, (C) water and, if desired, (D) an acid. The leather tanned or pretanned with this aqueous composition exhibits a good degree of whiteness and has a high shrinkage temperature.