Hydrolyzable and polymerizable silanes based on methylene dithiepane
CA 2317199 A1 · Owner: Stein, Sabine · Inventors: Volkel, Thomas; Stein, Sabine; Rheinberger, Volker
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Methylene dithiepane silanes according to Formula I (see formula I), in which R1 is a saturated or unsaturated aliphatic or alicyclic hydrocarbon radical with 1 to 10 carbon atoms which can be interrupted by one or more oxygen and/or sulphur atoms and can contain one or more ester carbonyl, amide and/or urethane groups or is an aromatic or, heteroaromatic hydrocarbon radical with 6 to 18 carbon atoms, the hydrocarbon radicals being able to be substituted or unsubstituted; R2 has one of the meanings given for R1 or is absent; R3 has one of the meanings given for R1 or is absent; R4 is equal to -(CHR6)n- -Y-CO-NH-(CHR6)n-, -Y-CO-NH-R5-, -(CHR6)n-S-R5- -S-R5-, -CO-O-R5- or, is absent, with n …
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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 August 31, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 31, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 31, 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.