Expired Canadian patentCanada
Endodontic treatment for the filling of the root canal of teeth
CA 1107650 A · Owner: Laboratoire Spad · Inventors: Duprez, Jean-Pierre; Ducos, Jacques
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordRead 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
- Granted August 25, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 25, 1998.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 18, 1978
GrantedAugust 25, 1981
Term endedAugust 25, 1998
Patent numberCA 1107650 A
Classification (IPC)C09K3/00 +1 more
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.