Dental materials based on polysiloxanes
CA 2296227 C · Owner: Stein, Sabine · Inventors: Rheinberger, Volker; Moszner, Norbert; Volkel, Thomas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to dental materials which contain at least one polysiloxane based on one or several silanes according to formula (I), (W q-R6-Z)p -R3m Y-R2-SiX n R 1 3-n Formula (I) in which X stands for a halogen atom, a hydroxyl alkoxy, and/or acyloxy group; n is equal to 1 to 3 R1 stands for an, alkyl, alkenyl, aryl alkylaryl, arylalkyl group; R2 stands, for an alkylene group; R3 stands for a p-time substituted straight, branched or cyclic, saturated or unsaturated aromatic or aliphatic organic radical with 2 to 40 carbon atoms and optionally 1 to 6 heteroatoms; R6 stands for a q-times substituted, straight, branched or cyclic organic radical with 1 to 20 carbon atoms or is …
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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 January 19, 2000 and granted June 17, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 19, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 19, 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.