Dental impression tray assembly and method of taking impressions
CA 2118473 A1 · Owner: Bushnell, Raymond Bryce · Inventors: Bushnell, Raymond Bryce
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract, An impression tray is provided with a dispersal member which receives impression material for delivery into the impression tray. A one-step method includes the provision of barriers on the impression tray to confine light bodied impression material in the tray during the delivery of the material into the tray and the taking of the impression. A two-step method entails the direct deposit of heavy bodied impression material into the impression tray and the taking of a preliminary impression. A jig for punching the preliminary impression confines the impression tray during the formation of passageways for later injected lighter impression material injected into the dispersal member …
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 October 19, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 19, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 19, 2016.
- 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.