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:
Dec. 18, 1990
Filed:
Apr. 25, 1989
Applicant:
Inventors:
Karlheinz Fuchs, Hunfelden, DE;
Norbert Munch, Kelkheim, DE;
Assignee:
Hoechst Aktiengesellschaft, Frankfurt am Main, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C14C / ; C14C / ;
U.S. Cl.
CPC ...
8 9427 ; 8 9418 ; 8 94 / ;
Abstract
Process for economy chrome tanning, which comprises pretreating the pelt prior to tanning with 0.5 to 2% by weight, preferably 0.7 to 1,2% by weight, of an aldehyde- or keto-carboxylic acid, tanning in a conventional manner and then finish-tanning with 2 to 4.5% by weight of a mixture of a chromium(III) salt, an acid-binding agent and an aromatic di- or tricarboxylic acid or a salt thereof.