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. 19, 1994
Filed:
Sep. 29, 1992
Applicant:
Inventor:
Teh-Kuei Chen, Gaylordsville, CT (US);
Assignee:
Nestec S.A., Vevey, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ; C07D / ;
U.S. Cl.
CPC ...
544410 ; 544405 ;
Abstract
Pryrazine compounds are obtained by reacting ammonium ions, an aldehyde, and a 1-hydroxy-2-ketone by heating and refluxing an aqueous medium containing the same wherein at least the ketone is introduced dropwise to obtain a reaction medium containing pyrazine compounds, and after which, the pyrazine compounds are isolated from the reaction medium.