Silicone foam forming composition
CA 2085319 A1 · Owner: Dow Corning Gmbh · Inventors: Colas, Andre R.L.; Mueller, Heinz
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
of the Invention, A foam forming composition comprises (a) one or more polysiloxanes having not less than three alkylhydrogen siloxane units per molecule, (b) one or more polysiloxanes having not less than two silicon-bonded hydroxyl group per molecule (c) at, least one liquid organic titanium compound and (d) a catalyst. Reaction between the organic titanate (e.g. tetraisopropyltitanate) and the hydroxy funtional polysiloxane rapidly increases viscosity of the mixture to restrict flow of the composition as it cures to form a foam within 240 seconds of mixing. A vinyl polysiloxane may be incorporated.
Read the whole patent
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, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 14, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 14, 2014.
- 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.