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. 29, 2009
Filed:
Jun. 03, 2004
Yukihiko Takahashi, Kanagawa, JP;
Tomiharu Yamada, Kanagawa, JP;
Yukihiko Takahashi, Kanagawa, JP;
Tomiharu Yamada, Kanagawa, JP;
Showa Denko K.K., Tokyo, JP;
Abstract
One embodiment of the invention provides the corundum for filling in resin comprising three components having different secondary particle sizes and specific surface areas as follows: component X of 35 to 80 μm and 1 to 0.01 m/g; component Y of 1 to 5 μm and 3 to 0.5 m/g; and component Z of 0.3 to 1.5 μm and 15 to 3 m/g, with a composition ratio by mass (X:Y:Z) being in the range surrounded by four points of (60:40:0), (95:0:5), (95:5:0) and (60:0:40) not including the borderlines in the ternary compositional diagram, and a composition obtained by filling a specific amount of the corundum into silicone oil has a viscosity of less than 2,000 poise and a linseed oil absorption of 10 ml/100 g or less.