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Expired Canadian patentCanada

Silicone pressure-sensitive adhesive composition

CA 1301979 C · Owner: Dow Corning Toray Silicone Company, Limited · Inventors: Murakami, Ichiro; Hamada, Yuji; Takuman, Osamu

CIPO record

Overview

Drawings and full text

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

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Abstract From the Canadian patent

A pressure-sensitive adhesive having an excellent tack and adhesive strength is obtained from a composition which comprises an organic solvent solution of an alkenyl group-containing silicone polymer having a gum-like consistency, a tackifying silicone resin a curing agent, for the alkenyl group-containing silicone polymer and a platinum-containing catalyst. The composition can be cured by heating at relatively low temperatures.

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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.
FiledJuly 14, 1987
GrantedMay 26, 1992
Term endedMay 26, 2009
Patent numberCA 1301979 C
Classification (IPC)C09J183/04

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedJuly 14, 1987Patent grantedMay 26, 1992Term endedMay 26, 2009

Sources & verification

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