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Expired Canadian patentCanada

Method of producing polysilane compounds

CA 1324795 C · Owner: Mitsui Chemicals Inc. · Inventors: Yokoyama, Keiichi; Kiso, Yoshihisa; Taniguchi, Katsuo

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

A method of producing poysilane compounds which comprises: polymerizing a monomeric silane compound represented by the general formula of, wherein R independently represents hydrogen or hydrocarbon group but not both R's are hydrogen at the same time in the presence of, an organometallic complex of Ni Co, Ru, Pd or Ir.

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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 November 30, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 30, 2010.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledOctober 7, 1988
GrantedNovember 30, 1993
Term endedNovember 30, 2010
Patent numberCA 1324795 C
Classification (IPC)C07F7/08 +1 more

Timeline

Timeline From CIPO dates

19891992199519982001200420072010Application filedOct 7, 1988Patent grantedNov 30, 1993Term endedNov 30, 2010

Sources & verification

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