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:
Mar. 04, 2014
Filed:
Mar. 02, 2011
Michiya Ishikawa, Moriyama, JP;
Hidetoshi Kato, Moriyama, JP;
Jiro Nakatani, Moriyama, JP;
Atsuhito Arai, Tacoma, JP;
Hiroaki Sakata, Tacoma, WA (US);
Hiroshi Taiko, Iyo-gun, JP;
Michiya Ishikawa, Moriyama, JP;
Hidetoshi Kato, Moriyama, JP;
Jiro Nakatani, Moriyama, JP;
Atsuhito Arai, Tacoma, JP;
Hiroaki Sakata, Tacoma, WA (US);
Hiroshi Taiko, Iyo-gun, JP;
Abstract
An epoxy compound of high-purity N,N,N',N′-tetraglycidyl-3,4′-diaminodiphenyl ether is produced by: an addition reaction step of reacting 3,4′-diaminodiphenyl ether with epichlorohydrin in a polar protic solvent at 65 to 100° C. for 12 hours or longer to form N,N,N′,N′-tetrakis(3-chloro-2-hydroxypropyl)-3,4′-diaminodiphenyl ether; and a cyclization reaction step of reacting the N,N,N′,N′-tetrakis(3-chloro-2-hydroxypropyl)-3,4′-diaminodiphenyl ether with an alkali compound for dehydrochlorination.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile