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Expired Canadian patentCanada

Process for production of calcium phosphate compound- coated composite material

CA 1269898 C · Owner: Permelec Electrode Ltd. · Inventors: Shimamune, Takayuki; Hosonuma, Masashi

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Abstract From the Canadian patent

A process for production of a calcium phosphate compound-coated composite material is disclosed comprising, oxidizing a metallic substrate to form a layer of the oxide of the metal component of the metallic substrate on the surface thereof, and forming a coating layer of a calcium phosphate compound on the surface of the oxide layer.

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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 June 5, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 5, 2007.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledOctober 15, 1987
GrantedJune 5, 1990
Term endedJune 5, 2007
Patent numberCA 1269898 C
Classification (IPC)B05D3/10 +2 more

Timeline

Timeline From CIPO dates

1988199019921994199619982000200220042006Application filedOct 15, 1987Patent grantedJune 5, 1990Term endedJune 5, 2007

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.