Dental root canal sealing composition
CA 2531152 C · Owner: Dentsply Detrey Gmbh · Inventors: Klee, Joachim E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention provides a dental sealing composition curable in the absence of a , polymerisation initiator which comprises (i) an amino terminated prepolymer having a , viscosity at 23°C of less than 100 Pa.cndot.s which is obtained by , reacting (a) one mole of a compound of formula (I), (see formula I) and (b) at least n moles of one or more compounds of either formula (II) (see formula II), or of formula (II) in combination with one or more compounds of formula RNH2 and/or , in combination with a further di- or polyamine compound; (ii) a di- or polyfunctional , acrylate compound or a di- or polyfunctional maleimide compound which is capable , of undergoing polyaddition with the …
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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 July 30, 2004 and granted July 16, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 30, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 30, 2026.
- 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.