Fine powder of single-crystalline diamond and method for production thereof
CA 2594669 C · Owner: Yamanaka, Hiroshi · Inventors: Ishizuka, Hiroshi; Shirasawa, Hisao; Yamanaka, Hiroshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An object of this invention is to provide a fine powder of diamond particles of less than , 50 nm with a narrow particle size range. The diamond is single crystalline and characterized , with a lot of sharp edges and sharp points. Another object is to provide a method for efficiently , producing such fine powder. The method comprises mechanically crushing a raw material of , single crystalline diamond particles to prepare starting minute particles of diamond, then , imparting hydrophilic quality to the surface of diamond particles. As hydrophilic the diamond , particles are dispersed in water to form a slurry which is set and kept , weakly alkaline. The slurry is then subjected to a …
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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 January 11, 2006 and granted July 9, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 11, 2026.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
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Timeline
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.