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Expired Canadian patentCanada

Method of forming compounds having si-n groups and resulting products

CA 1301774 C · Owner: Blum, Yigal · Inventors: Blum, Yigal; Laine, Richard M.

CIPO record

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Abstract From the Canadian patent

Si-N groups in silazanes (which may be siloxazanes) are cleaved in the presence of a suitable catalyst or one or more reactants containing an Si-H group and an N-H group (in the same molecule or in different molecules) are reacted in the presence of a suitable catalyst. New silazane products result including oligomers and polymers. Suitable catalysts include metal carbonyl complexes and heterogeneous metal catalysts such as platinum on carbon. Immediate products of reaction such as products containing Si-H and N-H groups resulting from Si-N cleavage and Si-N products resulting from Si-H + N-H reactions undergo further reaction, resulting in many cases in a mixture of oligomers or of …

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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 26, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 26, 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.
FiledMay 14, 1986
GrantedMay 26, 1992
Term endedMay 26, 2009
Patent numberCA 1301774 C
Classification (IPC)C07F7/10 +2 more

Timeline

Timeline From CIPO dates

19871990199319961999200220052008Application filedMay 14, 1986Patent grantedMay 26, 1992Term endedMay 26, 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.