Initiator for polymerising and/or cross-linking polyorganosiloxanes with cross-linkable functional groups, corresponding compositions and their uses
CA 2389014 C · Owner: Frances, Jean-Marc · Inventors: Deforth, Thomas; Frances, Jean-Marc
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a heat-activated initiator for polymerising and/or cross-linking polyorganosiloxane-type monomers oligomers and/or polymers with organofunctional groups comprising a boron derivative of formula (I): (A)¿x?B(R')¿y? wherein the symbols R' are the same or different and represent an alkyl or alkenyl radical in C¿1?-C¿12? an alkoxy radical in C¿1?-C¿12?, a phenyl radical substituted by at least one electroattractor element an aryl radical containing at least two aromatic rings such as biphenyl naphthyl, optionally substituted by at least one electroattractor element especially a halogen atom (particularly fluorine) or an electroattractor group, especially a CF¿3? NO¿2?, …
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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 October 6, 2000 and granted February 8, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 6, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 6, 2022.
- 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.