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Expired Canadian patentCanada

Process for the preparation of an aromatic hydrocarbons-containing mixture

CA 1295343 C · Owner: Sie, Swan Tiong · Inventors: Sie, Swan Tiong; Kieffer, Eduard Philip

CIPO record

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

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Abstract From the Canadian patent

A process for the preparation of an aromatic hydrocarbonscontaining mixture by contacting a natural gas containing more than 50%w of methane and furthermore paraffins with at least three carbon atoms per molecule at a pressure higher than 20 bar and at elevated temperature with a catalyst comprising a crystalline silicate containing at least one of the metals aluminium and gallium, which silicate has the following properties after one hour's calcination in air at 500°C:, a) an X-ray powder diffraction pattern in which the strongest lines are the lines given in Table A, and b) in the formula which represents the composition of the silicate, expressed as moles of the oxides the SiO2/Al2O3, …

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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 February 4, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 4, 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.
FiledFebruary 7, 1986
GrantedFebruary 4, 1992
Term endedFebruary 4, 2009
Patent numberCA 1295343 C
Classification (IPC)C07C2/00 +2 more

Timeline

Timeline From CIPO dates

19871990199319961999200220052008Application filedFeb 7, 1986Patent grantedFeb 4, 1992Term endedFeb 4, 2009

Sources & verification

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