Symmetric cvd diamond articles and method of their preparation
CA 2056239 A1 · Owner: Anthony, Thomas R. · Inventors: Fleischer, James F.; Anthony, Thomas R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention is directed to a method for the chemical vapor deposition (CVD) of a layer of diamond on a substrate held at elevated CVD diamond-forming temperature wherein a hydrocarbon gaseous mixtures is passed over a hot elongatefilament for at least partially decomposing said mixture to form said CVD diamond layer on said substrate. The present invention specifically is directed to forming a substantially uniformly thick CVD diamond layer on the substrate which is stationary. Such method comprises disposing said substrate stationarily at a distance C, from a, hot elongate filament. The substrate has a maximum radius R, which is defined as the, maximum distance from the center of …
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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 28, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 28, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 28, 2013.
- 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.