Polycrystal diamond fluted tool and a process for the production of the same
CA 2000417 A1 · Owner: Sumitomo Electric Industries, Ltd. · Inventors: Nakamura, Tsutomu; Nakai, Tetsuo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A polycrystal diamond fluted tool and a process for the production of the same, ABSTRACT OF THE DISCLOSURE A polycrystal diamond fluted tool which is capable of effecting working with much higher accuracy and longer life as compared with the sintered diamond straight flute tool of the prior art, and is particularly suitable for finishing working with high accuracy is provided by forming a polycrystal diamond film on the surface of a substrate subjected to helical grinding by a vapor phase synthesis method, then subjecting the product to a chemical treatment to dissolve and remove only the substrate, brazing the resulting polycrystal diamond film in a fluted form to at least a part of the …
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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 October 11, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 11, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 11, 2011.
- 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.