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. 03, 2013
Filed:
Dec. 08, 2009
Tooru Kikuchi, Hitachi, JP;
Hayato Kotani, Tsukuba, JP;
Katsuyuki Masuda, Chikusei, JP;
Toshihiko Takasaki, Tsukuba, JP;
Tooru Kikuchi, Hitachi, JP;
Hayato Kotani, Tsukuba, JP;
Katsuyuki Masuda, Chikusei, JP;
Toshihiko Takasaki, Tsukuba, JP;
Hitachi Chemical Co., Ltd., Tokyo, JP;
Abstract
The invention relates to a tetracarboxylic dianhydride represented by the following formula (1). [In formula (1) R, R, Rand Reach independently represent an alkyl group having from 1 to 5 carbon atoms, m represents a number from 1 to 30, all of the silicon atoms bonding to the norbornane rings are in an exo-configuration with respect to the norbornane rings, and all of the dicarboxylic anhydride groups bonding to the norbornane rings are in an exo-configuration with respect to the norbornane rings.]