Method and apparatus for coating a substance with diamond film
CA 2190231 C · Owner: Simpson, Matthew A. · Inventors: Simpson, Matthew A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method is disclosed depositing synthetic diamond film on a substrate, comprising the steps of prestressing said substrate to obtain a pre-deposition stress across a surface thereof, depositing said diamond film on the pre-stressed substrate surface and, cooling said film and substrate and relieving said predeposition stress during said cooling. There is also disclosed an apparatus for depositing synthetic diamond film on a substrate, comprising means for pre-stressing said substrate to obtain a pre-deposition stress across a surface thereof, means for depositing said diamond film on the pre-stressed substrate surface and means, for relieving said pre-deposition stress while cooling said …
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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 November 13, 1996 and granted July 11, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 13, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 13, 2018.
- 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
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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.