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. 26, 2025
Filed:
Aug. 19, 2021
Applicant:
Evonik Operations Gmbh, Essen, DE;
Inventors:
Timo Stahl, Limeshain, DE;
Axel Ronneburg, Hanau, DE;
Barbara Jäger, Mainhausen, DE;
Philipp Roth, Hanau, DE;
Assignee:
Evonik Operations GmbH, Essen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 277/02 (2006.01); C07C 277/00 (2006.01);
U.S. Cl.
CPC ...
C07C 277/02 (2013.01); C07C 277/00 (2013.01);
Abstract
A method for preparing guanidino acetic acid involves reacting cyanamide and glycine in an aqueous reaction mixture in the presence of a base. The ammonia content in the reaction mixture is controlled to be below 20 g/L, and the dicyandiatrade content in the reaction mixture is kept below 5 wt.-%.