Method for adhering to tooth structure
CA 2131118 A1 · Owner: Huang, Chin-Teh · Inventors: Huang, Chin-Teh; Blackwell, Gordon; Jefferies, Steven
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method is provided for clinical retention of restorative material by a naturaltooth. A first portion of photopolymerizable liquid primer/adhesive dental composition is applied to a tooth surface. After leaving the first portion of the liquid composition on the tooth surface undisturbed for at least 15 seconds on the tooth surface air is conveyed against the first portion of the liquid. The light is impinged on the first portion of the liquid composition whereby at least a portion of the first portion of the liquid composition polymerizes to form a first coating on the tooth. A second portion of the liquid composition is applied to the first coating, and air is substantially immediately …
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 August 30, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 30, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 30, 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.