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Expired Canadian patentCanada

Crystalline aluminosilicate, the synthesis thereof and its use in organic conversion

CA 1251438 A · Owner: Mobil Oil Corporation · Inventors: Herbst, Joseph A.; Klocke, Donald J.; Vartuli, James C.

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Abstract From the Canadian patent

There is disclosed an aluminosilicate zeolite having an SiO2 to Al2O3 molar ratio of 5-500 and the x-ray diffraction pattern shown in Table I of the specification. The zeolite which, is useful as a catalyst in organic conversions can be produced from, an aqueous reaction mixture containing a 2-(hydroxyalkyl)trialkylammonium cation.

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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 March 21, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 21, 2006.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 5, 1985
GrantedMarch 21, 1989
Term endedMarch 21, 2006
Patent numberCA 1251438 A
Classification (IPC)C01B39/12 +2 more

Timeline

Timeline From CIPO dates

1986198919921995199820012004Application filedSep 5, 1985Patent grantedMarch 21, 1989Term endedMarch 21, 2006

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