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. 26, 1989
Filed:
Sep. 09, 1986
Applicant:
Inventors:
Assignee:
Rohm GmbH, Darmstadt, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C14C / ; C14C / ; C14C / ;
U.S. Cl.
CPC ...
435265 ; 435262 ; 8 94 / ; 8 94 / ; 8 9415 ; 8 9418 ; 8 94 / ; 8 942 ;
Abstract
Methods for making leather from animal hides and skins in the presence of surface active agents wherein certain phosphonic acid compounds are used in place of, or in combination with, known surface active agents.