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:
Oct. 02, 2018
Filed:
Jul. 25, 2014
Tfl Ledertechnik Gmbh, Weil am Rhein, DE;
Jens Fennen, Grenzach-Wyhlen, DE;
Eric Kientz, Ferrette, FR;
Florian Döppert, Schliengen, DE;
Nina Schulte, Freiburg, DE;
TFL LEDERTECHNIK GMBH, Weil am Rhein, DE;
Abstract
The present invention is directed to a process for retanning leather comprising the steps of: a) providing tanned or pre-tanned leather b) treating the tanned leather of step a) with a composition comprising hollow microspheres, preferably as an aqueous composition, the hollow microspheres have a true density of from 0.01 to 0.10 g/cm(25° C.) and/or a bulk density of the dry powder of 0.005 to 0.06 g/cm(25° C.), c) drying, whereby the temperature of the leather during drying does not exceed 75° C. as well as to leather obtained by said process.