Organopolysiloxane composition for the formation of a release film
CA 2003791 C · Owner: Dow Corning Toray Silicone Company, Limited · Inventors: Masaoka, Hiroshi; Sasaki, Shosaku
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A curable organopolysiloxane composition comprising an organopolysiloxane having higher alkenyl groups an, organohydrogenpolysiloxane crosslinker an, organopolysiloxane free of alkenyl groups and silicon-bonded hydrogen atoms, a platinum group metal-containing catalyst and an inhibitor therefor provides for the formation of a cured release film. When this composition is coated on the surface of any of various types of substrates, for example paper, synthetic, resin films, fibers, etc. and then heated for 10 to 20 seconds at 80 to 90 degrees Centigrade it forms a cured, film which manifests an extremely good release performance for tacky substances, such as for example, pressure-sensitive …
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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
- Filed November 24, 1989 and granted July 20, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 24, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 24, 2011.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.