Platinum catalyzed process for preparation of alpha, omega-silylalkenes and organosiloxane copolymers
CA 2079854 A1 · Owner: Durfee, Loren D. · Inventors: Hilty, Terrence K.; Durfee, Loren D.; Durfee, Loren D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
PLATINUM CATALYZED PROCESS FOR PREPARATION OF ALPHA,OMEGA-SILYLALKENES AND ORGANOSILOXANE COPOLYMERS ABSTRACT, The present invention is a process for the preparation of .alpha..OMEGA.-silylalkenes and organosiloxane copolymers and for the compositions prepared by the process. A platinum catalyst is employed which selectively catalyzes the hydrosilylation of the terminal carbons of an .alpha..OMEGA.-triene with an organosiloxane containing at least one silicon-bonded hydrogen.
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 October 5, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 5, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 5, 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.