Method for preparation of silyl functional fumarates
CA 2018236 C · Owner: Dow Corning Corporation · Inventors: Plueddemann, Edwin Paul
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Silyl-functional fumarates are formed through the reaction of a methyl ester of a maleate with a chloroalkyl or chloroaryl silane or disiloxane in the presence of an amine or phosphine catalyst. These materials are useful as adhesion promoters for polyolefins.
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 June 5, 1990 and granted November 3, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 5, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 5, 2012.
- 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.