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Expired Canadian patentCanada

Coating method and silicone composition for psa release coating

CA 1261509 A · Owner: Dow Corning Corporation · Inventors: Homan, Gary R.; Stickles, David L.

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Abstract From the Canadian patent

Abstract, Moisture-curable silicone compositions for adhesive-release coatings comprising an alkoxysilyiorganosiloxane, a titanium ester and an aminoorganosiloxane have an adhesive-release force, when cured which is, directly related to the amount and type of aminoorganosiloxane. The compositions are useful for coating a flexible sheet material, such as paper or polymeric film to, provide a surface that will release pressure sensitive adhesive with a pre-selected release force of up to 400 g/in 154 N/m). Thin coatings or the composition cure in as little as 15 seconds when exposed to moisture.

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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 September 26, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 26, 2006.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJanuary 23, 1985
GrantedSeptember 26, 1989
Term endedSeptember 26, 2006
Patent numberCA 1261509 A
Classification (IPC)C09D183/14 +2 more

Timeline

Timeline From CIPO dates

1986198919921995199820012004Application filedJan 23, 1985Patent grantedSep 26, 1989Term endedSep 26, 2006

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