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Expired Canadian patentCanada

Room-temperature curable silicone-modified polyether composition

CA 1296832 C · Owner: Toray Silicone Company, Ltd. · Inventors: Mikami, Ryuzo

CIPO record

Overview

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

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Abstract From the Canadian patent

Room-temperature curable composition made from a silicone-modified polyether containing silyl end groups having hydrolyzable groups and ester provide a cured silicone product which does not have a tacky surface. Adding a sensitizer to the composition increases the reliability of the surface to be void of tack. These compositions have less dirt pickup.

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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 March 3, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 3, 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.
FiledDecember 10, 1986
GrantedMarch 3, 1992
Term endedMarch 3, 2009
Patent numberCA 1296832 C
Classification (IPC)C08K5/10 +2 more

Timeline

Timeline From CIPO dates

19871990199319961999200220052008Application filedDec 10, 1986Patent grantedMarch 3, 1992Term endedMarch 3, 2009

Sources & verification

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