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Expired Canadian patentCanada

Mixed metal oxide powders, mixtures of these, metal oxide powders, and their use in the catalytic dehydration of hydrocarbons

CA 1331174 C · Owner: Kern, Jurgen · Inventors: Gottlieb, Klaus; Schramm, Bernhard; Kern, Jurgen

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Abstract From the Canadian patent

Metal oxide powders of the group chromium (III) oxide titanium (IV) oxide, vanadium (V) oxide mixtures thereof, or, mixed metal oxide powders from two representatives of the above group as well as mixtures thereof, and their use in the catalytic dehydration of hydrocarbons. New metal oxide powders or mixtures thereof, new mixed metal oxides or mixtures thereof, with advantageous properties including BET areas of 5 to 50, m2/g and particle diameters of 25 to 350 nm are provided. With the help of the above compounds, the conversion and selectivity of the production of mono-olefins is to be increased during the catalytic dehydration of saturated hydrocarbons. The metal oxide powders are …

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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 2, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 2, 2011.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 15, 1988
GrantedAugust 2, 1994
Term endedAugust 2, 2011
Patent numberCA 1331174 C
Classification (IPC)B01J37/34 +2 more

Timeline

Timeline From CIPO dates

19891992199519982001200420072010Application filedNov 15, 1988Patent grantedAug 2, 1994Term endedAug 2, 2011

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