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:
Jun. 05, 2001
Filed:
Aug. 27, 1999
Applicant:
Inventors:
Christoph Theis, Niederkassel, DE;
Stephan Bruhn, Handorf, DE;
Assignee:
Degussa-Huels Aktiengesellschaft, Frankfurt, DE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
C07D / ;
Abstract
A process for the preparation of guanine, by reacting 2,4-diamino-5-formylamino-6-hydroxypyrimidine (DAFHP) with formic acid, in the absence of formalize. The process may be conducted with the addition of water and at reflux temperature.