Silicone rubber composition
CA 2292229 A1 · Owner: Takuman, Osamu · Inventors: Nakamura, Akito; Takuman, Osamu; Yoshitake, Makoto
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A silicone rubber composition comprising (A) 100 weight parts of a polydiorganosiloxane mixture comprising (i) 1 to 99 wt% polydiorganosiloxane having at, least two silicon atom-bonded vinyl groups per molecule and (ii) the remaining percentage of polydiorganosiloxane having at least two non-vinyl silicon atombonded, alkenyl groups per molecule, (B) a polyorganosiloxane having at least two silicon atom-, bonded hydrogen atoms per molecule (C) 0.1 to 10 weight parts of a silatrane derivative, described by general formula where each R1 group is independently selected from the group consisting of a hydrogen, atom and alkyl groups; each R2 group is independently selected from the group …
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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 December 14, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 14, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 14, 2021.
- 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.