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Expired Canadian patentCanada

Highly reactive concentrated irradiated catalytic complexes as low temperature curing agents for organic resins

CA 1269792 C · Owner: Sadhir, Rajender K. · Inventors: Luck, Russell M.; Sadhir, Rajender K.; Margo, George L.

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Abstract From the Canadian patent

26 51,803, ABSTRACT OF THE DISCLOSURE, A highly reactive catalytic complex is formed by irradiation of a mixture of carboxylic acid anhydride and a carbon containing cyclic compound containing an electron deficient component, where the catalytic complex is concentrated without the use of heat to a weight of from about 55% to about 80% of its original weight to provide, a concentrated catalytic complex.

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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 May 29, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 29, 2007.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 9, 1985
GrantedMay 29, 1990
Term endedMay 29, 2007
Patent numberCA 1269792 C
Classification (IPC)C08K5/09 +2 more

Timeline

Timeline From CIPO dates

19861989199219951998200120042007Application filedMay 9, 1985Patent grantedMay 29, 1990Term endedMay 29, 2007

Sources & verification

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