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Expired Canadian patentCanada

Method for making curable casting resins

CA 1290486 C · Owner: Ittmann, Guenther · Inventors: Ittmann, Guenther; Krieg, Manfred

CIPO record

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Abstract From the Canadian patent

A method for making curable casting resins having a high content of finely divided inorganic fillers and comprising esters of acrylic or methacrylic acid and organosilicon compounds used as adhesion promoters which method, involves mixing the liquid polymer precursor comprising acrylic or methacrylic esters with the organosilicon compound and with an alkylamine as a catalyst for the organosilicon compound, the finely divided inorganic fillers being incorporated into the resulting mixture in such amounts that the viscosity of the mixture does not exceed 10 Pa.sec the, resulting thixotropic suspension then being transformed into a completely deflocculated low viscosity suspension by being …

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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 October 8, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 8, 2008.
  • 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, 1986
GrantedOctober 8, 1991
Term endedOctober 8, 2008
Patent numberCA 1290486 C
Classification (IPC)C08F20/12 +2 more

Timeline

Timeline From CIPO dates

19871990199319961999200220052008Application filedSep 5, 1986Patent grantedOct 8, 1991Term endedOct 8, 2008

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