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Expired Canadian patentCanada

Preparation of metal diboride powders

CA 1209786 A · Owner: United States Of America (Government Of The) United States Department Of Energy · Inventors: Bamberger, Carlos E.; Brynestad, Jorulf

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

Abstract of the Disclosure Finely-divided titanium diboride or zirconium diboride powders are formed by reacting gaseous boron trichloride with a material selected from the group consisting of titanium powder zirconium powder, titanium dichloride powder titanium trichloride powder, and gaseous titanium trichloride.

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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 August 19, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 19, 2003.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 17, 1984
GrantedAugust 19, 1986
Term endedAugust 19, 2003
Patent numberCA 1209786 A
Classification (IPC)C01B35/02 +1 more

Timeline

Timeline From CIPO dates

1985198719891991199319951997199920012003Application filedApril 17, 1984Patent grantedAug 19, 1986Term endedAug 19, 2003

Sources & verification

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