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. 02, 1991
Filed:
Mar. 02, 1990
Applicant:
Inventors:
Toshimichi Ito, Chiba, JP;
Satoshi Katsumata, Chiba, JP;
Masakazu Watanabe, Nagoya, JP;
Satoshi Iio, Nagoya, JP;
Assignees:
Idemitsu Petrochemical Company Limited, Tokyo, JP;
NGK Spark Plug CP. Ltd., Aichi, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B05D / ;
U.S. Cl.
CPC ...
427 39 ; 51293 ; 51295 ; 427 38 ; 427 451 ; 427249 ; 4272553 ;
Abstract
The present invention is directed to a method of producing a sintered hard metal having a diamond film wherein a gas that is obtained by activating a raw material gas containing 2 to 60 mol % of carbon monoxide and hydrogen gas is brought in contact with a sintered hard metal to form a diamond film, thereby a diamond film can be formed on said sintered hard metal with the adhesion of the diamond excellent.