Diamond-or diamond-like carbon-coated hard materials
CA 2060823 C · Owner: Omori, Naoya · Inventors: Nomura, Toshio; Omori, Naoya
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A diamond-coated hard material having a diamond- or diamond-like carbon coated layer with a high bonding strength to a substrate is provided. The coated hard material comprising a diamond- and/or diamond-like carbon-coating layer formed on the surface of a hard material i.e. substrate is character-, ized in that (I) (1) microscopic roughness is present on the surface of the sub-, strate and (2) protrusive parts thereof are defined by the surface roughness Rmax within a range of 1.0 to 30 µ m in a standard length when the standard length is 50 µ m in the interface of the diamond- and/or diamond-like carbon, coated layer and the substrate and (II) (1) microscopic roughness is present on, …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed February 7, 1992 and granted September 10, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 7, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 7, 2014.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.