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Expired Canadian patentCanada

Preparation of saturated primary amines

CA 1231976 A · Owner: Pennwalt Corporation · Inventors: Duffner, Paul; Frank, Gerhard; Neubauer, Gerald

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Abstract From the Canadian patent

13 - O.Z.0050/36947, Abstract of the Disclosure: Saturated primary amines are prepared by reacting a nitrile with hydrogen at elevated temperatures and under superatmospheric pressure in the presence of ammonia by a process in which a molded catalyst material as used which has an indentation hardness of >300 kp/cm2 and contains metallic cobalt and/or nickel particles, obtained from cobalt oxide and/or nickel oxide particles containing less than 0.1% by weight of alkali metal oxides and/or alkaline earth metal oxides by reduction with hydrogen at <500°C, and a lubricant.

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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 January 26, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 26, 2005.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJanuary 25, 1985
GrantedJanuary 26, 1988
Term endedJanuary 26, 2005
Patent numberCA 1231976 A
Classification (IPC)C07C209/48 +2 more

Timeline

Timeline From CIPO dates

1986198819901992199419961998200020022004Application filedJan 25, 1985Patent grantedJan 26, 1988Term endedJan 26, 2005

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