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:
Jul. 18, 1978
Filed:
May. 31, 1977
Wolfgang Bockelman, Leverkusen, DE;
Hans Niederprum, Monheim, DE;
Bayer Aktiengesellschaft, Leverkusen, DE;
Abstract
In the chrome-tanning of skins with a chromium (III) salt and an acid-binding agent, the improvement which comprises effecting the chrome-tanning in the presence of a water-soluble partial ester of a polycarboxylic acid containing 4 to 11 carbon atoms which ester hydrolyzes into the free acid or its salt. The partial ester is advantageously present in about 0.5 to 2, preferably 1,3 to 1.8, times the molar amount of the chromium salt expressed as Cr.sub.2 O.sub.3. The tanning composition can be formed by dissolving the desired ingredients and the solution spray dried to provide a properly formulated powder which can thereafter by employed to re-formulate the solution.