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:
Apr. 10, 2012
Filed:
Sep. 25, 2007
Mutsuo Nakashima, Joetsu, JP;
Yoshitaka Hamada, Joetsu, JP;
Katsuya Takemura, Joetsu, JP;
Kazumi Noda, Joetsu, JP;
Mutsuo Nakashima, Joetsu, JP;
Yoshitaka Hamada, Joetsu, JP;
Katsuya Takemura, Joetsu, JP;
Kazumi Noda, Joetsu, JP;
Shin-Etsu Chemical Co., Ltd., Tokyo, JP;
Abstract
In a mixture of silsesquioxane compounds comprising silsesquioxane units having a side chain including a direct bond between a silicon atom and a norbornane skeleton and having a degree of condensation of substantially 100%, a dimethylene chain of the norbornane skeleton remote from the silicon bonded side is substituted with at least one substituent group other than hydrogen, and an isomer having a bulkier substituent group on the dimethylene chain at an exo position is present in a higher proportion.