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:
Oct. 14, 1986
Filed:
Sep. 11, 1985
Applicant:
Inventors:
Kazuhisa Ito, Fujimi, JP;
Yoshio Fukuda, Kawagoe, JP;
Assignee:
Kawaken Fine Chemicals Co., Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
548317 ; 544315 ;
Abstract
A process for preparing a cyclic N,N'-dimethyl urea derivative by reacting a cyclic urea compound with formaldehyde, in a medium, in the presence of hydrogen and a hydrogenation catalyst. The reaction is carried out in the presence of a solid acid obtained by calcining sulfuric acid and aluminum oxide or sulfuric acid, phosphoric acid and aluminum oxide.