Dental root canal sealing composition
CA 2533096 C · Owner: Klee, Joachim E. · 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 root sealing composition curable in the absence of a polymerization initiator and having a viscosity at 23°C of less, than 100 Pa*s, which comprises: (i) an amino terminated prepolymer having a viscosity at 23°C of less than 100 Pa*s 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 either of formula (II) (see formula II) , or of formula (II) in combination with one or more di- or polyamine compounds; (ii) a di- or polyfunctional acrylate compound or a di- or polyfunctional maleimide compound capable of undergoing polyaddition with the prepolymer (i); (iii) 40 to 85 …
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 July 30, 2004 and granted February 5, 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.