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:
Apr. 23, 1991
Filed:
Sep. 12, 1989
Harro Traubel, Leverkusen, DE;
Heinrich Strenger, Leverkusen, DE;
Karl A Weber, Betzweiler, DE;
Hans-Werner Muller, Cologne, DE;
Horst Zapfel, Karlsruhe, DE;
Axel Hummel, Neuffen, DE;
Bayer Aktiengesellschaft, Leverkusen, DE;
Abstract
In the finishing of leather by spray application in an electrostatic field it is possible to use highly concentrated solutions if these solutions are sprayed into a solvent atmosphere in the presence of inert gases. The finishing process utilizes a solvent atmosphere which has a solvent content of 15-90% of the saturation concentration and a residual oxygen content of less than 10% by volume. The finishes contained are immediately stackable. By working with concentrated solutions it is possible to recycle the solvent from the waste air in an economically acceptable manner.