Polycrystalline diamond body
CA 1105497 A · Owner: General Electric Company · Inventors: Tuft, Roy E.; Lee, Minyoung; Szala, Lawrence E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A mass of diamond crystals contacting a mass of elemental silicon is confined within a pressure-transmitting medium. The resulting charge assembly is subjected to a pressure of at least 25 kilobars, causing application of isostatic pressure to the contacting masses which dimensionally, stabilizes them and increases the density of the mass of diamond crystals. The resulting pressure-maintained charge assembly is heated to a temperature sufficient to melt the silicon, at which temperature no significant graphitization of the diamond occurs, whereby the silicon is infiltrated through the interstices between the diamond crystals producing upon, cooling, an Adherently-bonded integral body. 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
- Granted July 21, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 21, 1998.
- 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.