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:
Nov. 17, 2020
Filed:
Apr. 30, 2019
Applicant:
Unitika Ltd., Amagasaki, JP;
Inventors:
Yuki Yamada, Uji, JP;
Tatsuya Morikita, Uji, JP;
Yosuke Sugimoto, Uji, JP;
Takeshi Yoshida, Uji, JP;
Akira Shigeta, Uji, JP;
Yoshiaki Echigo, Uji, JP;
Assignee:
UNITIKA LTD., Amagasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D 207/448 (2006.01); B01D 11/04 (2006.01); B01D 9/00 (2006.01); C07C 267/00 (2006.01);
U.S. Cl.
CPC ...
C07D 207/448 (2013.01); B01D 9/005 (2013.01); B01D 11/0492 (2013.01); C07C 267/00 (2013.01);
Abstract
An object is to provide a method for easily producing maleimide (MI) in which trace amounts of residual acid components as impurities in a crude MI are efficiently reduced, that is, the acid value is sufficiently reduced.