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. 27, 1990
Filed:
Feb. 16, 1989
Applicant:
Inventors:
Takeyuki Fujita, Yokosuka, JP;
Tuyoshi Irie, Kobe, JP;
Yasuyuki Takayanagi, Yokohama, JP;
Takeshi Narita, Yokohama, JP;
Yuya Yano, Yokohama, JP;
Assignees:
Nitto Chemical Industry Co., Ltd., Tokyo, JP;
Mitsubishi Rayon Co., Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C07D / ; C07D / ;
U.S. Cl.
CPC ...
548548 ; 548549 ;
Abstract
N-substituted maleimides are prepared by reacting maleic anhydride with an amine in the presence of Cu or a copper compound and purifying the maleimide produced in the absence of presence of said Cu or copper compound. N-substituted maleimides are widely useful or starting materials or intermediates for medicines, agricultural chemicals, dyes, macromolecular compounds, and the like.