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:
Feb. 11, 1992
Filed:
Apr. 18, 1990
Applicant:
Inventors:
Takashi Okada, Yokkaichi, JP;
Takamichi Aoyama, Yokkaichi, JP;
Shoichi Mizuno, Yokkaichi, JP;
Akihiro Akatsuka, Yokkaichi, JP;
Kiyonari Matsuoka, Mie, JP;
Assignee:
Shin-Daikyowa Petrochemical Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
548458 ;
Abstract
N-substituted maleimide represented by formula (2): ##STR1## is produced from N-substituted maleamic acid monoester represented by formula (1): ##STR2## in the presence of an acid catalyst by elmination of an alcohol from the monoester. The above N-substituted maleamic acid monoester represented by formula (1) is produced by esterification of N-substituted maleamic acid represented by formula (3): ##STR3## with an alcohol R.sup.2 -OH in the represence of an acid catalyst.