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:
May. 30, 1995
Filed:
Nov. 07, 1994
Applicant:
Inventors:
Osamu Suzuki, Tokyo, JP;
Hirohiko Yokomizo, Tokyo, JP;
Takeshi Arai, Tokyo, JP;
Namiko Nakajima, Tokyo, JP;
Assignee:
Nisshinbo Industries, Inc., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
564308 ;
Abstract
An aromatic diamine compound represented by formula (1): ##STR1## wherein R.sub.1 and R.sub.2, which may be the same or different, are each a hydrogen atom or a lower alkyl group; and an aromatic diamine compound useful as an intermediate for the synthesis of the above compound (1), represented by formula (2): ##STR2## The compound (1) alleviates the problems of the prior art, and is unlikely to cause crystallization by heat and has a melting point and a glass transition temperature both higher than those of conventional compounds.