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:
Jul. 29, 2008
Filed:
May. 21, 2002
Hirohiko Ohtsubo, Shiojiri, JP;
Eiji Ihara, Shiojiri, JP;
Takuya Okubo, Shiojiri, JP;
Makoto Kasahara, Shiojiri, JP;
Makoto Iizuka, Shiojiri, JP;
Hirohiko Ohtsubo, Shiojiri, JP;
Eiji Ihara, Shiojiri, JP;
Takuya Okubo, Shiojiri, JP;
Makoto Kasahara, Shiojiri, JP;
Makoto Iizuka, Shiojiri, JP;
Showa Denko K.K., Tokyo, JP;
Abstract
The present invention relates to a method for producing cubic boron nitride abrasive grains used for producing a grinding wheel, etc., and to cubic boron nitride abrasive grains. The method comprises maintaining a mixture containing hexagonal boron nitride and seed crystals of cubic boron nitride under pressure and temperature conditions where cubic boron nitride remains thermodynamically stable, characterized in that the seed crystals contain cubic boron nitride twin crystals.