Precision attachment device for a removable dental prosthesis
CA 2222241 C · Owner: Dawson, Peter E. · Inventors: Dawson, Peter E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A precision attachment device for securing a removable dental prosthesis in the mouth. The attachment includes a first section (11) operatively arranged to be secured to a fixed tooth (13), and a second section (12) operatively arranged to be secured in various positions of rotation within the prosthesis and also being arranged to matingly engage the first section (11). The second section has a first mating member (26) having a throughbore (30) therein and , also having en elongated casing (28) rotatably disposed within the throughbore (30) of the first mating member (26). The second section (12) also includes a spring loaded plunger member (32) disposed within the casing and …
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 February 26, 1996 and granted March 27, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 26, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 26, 2018.
- 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.