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:
Sep. 11, 2007
Filed:
Feb. 16, 2004
Applicants:
Hideyasu Asakage, Tokyo, JP;
Nobuhisa Saito, Tokyo, JP;
Yukio Nakamura, Tokyo, JP;
Inventors:
Assignee:
Tohto Kasei Co., Ltd, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C08L 63/00 (2006.01); C08L 63/02 (2006.01); H01L 21/56 (2006.01);
U.S. Cl.
CPC ...
Abstract
A process for production a high purity epoxy compound with total chlorine content of 500 ppm or less is characterized in that alkali metal hydroxide is added to a bifunctional epoxy compound represented by the general formula (I), in which content of the component with n=0 is not less than 70% and less than 100%, and that reaction is caused to take place at a temperature of 95-150° C. to produce a multi-functional epoxy compound represented by the general formula (II)