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:
Aug. 12, 2008
Filed:
Jan. 21, 2004
Stephan Hueffer, Ludwigshafen, DE;
Oliver Reese, Ludwigshafen am Rhein, DE;
Walter Gramlich, Mannheim, DE;
Stefan Schroeder, Neuleiningen, DE;
Guenter Scherr, Ludwigshafen, DE;
Volker Bach, Neustadt, DE;
Stephan Hueffer, Ludwigshafen, DE;
Oliver Reese, Ludwigshafen am Rhein, DE;
Walter Gramlich, Mannheim, DE;
Stefan Schroeder, Neuleiningen, DE;
Guenter Scherr, Ludwigshafen, DE;
Volker Bach, Neustadt, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
Abstract
Adducts are obtained by reacting carbonyl compounds of the formula I where Rand Rare as defined, with cyclic compounds of the formula II where X is selected from oxygen, sulfur and N—R, R-Rare as defined, and n is an integer from 1 to 4, which adducts are useful as tanning agents and preservatives.