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:
Oct. 30, 1990
Filed:
Jul. 07, 1988
Toshio Nomura, Itami, JP;
Masuo Chudo, Itami, JP;
Sumitomo Electric Industries, Ltd., Osaka, JP;
Abstract
A coated cemented carbide tool insert with a lengthened life is provided which comprises a substrate of a cemented carbide and a coating film provided thereon consisting of one or more layers of 2 to 20 .mu.m in thickness, each consisting of a compound with a higher hardness than the substrate, in which at least the surface of the coating film, on and near the ridgeline of cutting tip, of the surfaces of the tool is substantially composed of a smooth surface with a surface roughness Rmax of at most 0.2 .mu.m to the standard length of 5 .mu.m.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile