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:
Sep. 15, 1998
Filed:
Jul. 28, 1997
Applicant:
Inventors:
Naoyuki Sugii, Iwaki, JP;
Toshiyuki Yamauchi, Tokyo, JP;
Eisuke Kanagawa, Kitamoto, JP;
Hideo Aoki, Toda, JP;
Kazuyuki Ishihara, Toda, JP;
Assignee:
Johoku Chemical Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
548260 ; 548259 ;
Abstract
A 2-hydroxyphenylbenzotriazole is reacted with a formaldehyde and an amino alcohol in an organic solvent in the presence of a basic catalyst. It is thereby possible to obtain bis(2-hydroxyphenyl-3-benzotriazole) methanes efficiently and at a high yield.