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Expired Canadian patentCanada

Imidopolysiloxanes and method for making

CA 1304092 C · Owner: General Electric Company · Inventors: Rich, Jonathan D.

CIPO record

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Abstract From the Canadian patent

RD-17,519, IMIDOPOLYSILOXANES AND METHOD FOR MAKING ABSTRACT OF THE DISCLOSURE, Imidopolysiloxane gums resins and fluids are made, by equilibrating imidocylclopolysiloxanes with organocyclopolysiloxanes, or cohydrolyzing imidosilanes and organosilanes. The resulting imidopolysiloxanes are useful as temperature and solvent resistant resin and fluids and can be converted to temperature and solvent resistant elastomers.

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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 June 23, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 23, 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.
FiledAugust 27, 1987
GrantedJune 23, 1992
Term endedJune 23, 2009
Patent numberCA 1304092 C
Classification (IPC)C07F7/10 +2 more

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedAug 27, 1987Patent grantedJune 23, 1992Term endedJune 23, 2009

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