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Expired Canadian patentCanada

Method for ammoxidation of paraffins and catalyst therefor

CA 1304094 C · Owner: Friedrich, Maria S. · Inventors: Suresh, Dev D.; Brazdil, James F.; Orndoff, David A.

CIPO record

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Abstract From the Canadian patent

Disclosed is a process for the vapor phase ammoxidation of a C3 to C5 paraffin to an .alpha..beta.-unsaturated nitrile having 3-5 C atoms using aparticulate bismuth-vanadium oxide catalyst containing at least one other specified element. 9-FEB-88

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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 23, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 23, 2009.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 10, 1988
GrantedJune 23, 1992
Term endedJune 23, 2009
Patent numberCA 1304094 C
Classification (IPC)C07C253/24 +1 more

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedMarch 10, 1988Patent grantedJune 23, 1992Term endedJune 23, 2009

Sources & verification

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