Back casting prefabricated incisal veneers
CA 2442215 A1 · Owner: Glidewell, James R. · Inventors: Glidewell, James R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved lost wax method for fabricating dental devices a prefabricated , incisal veneer (1) is selected from among a group of said veneers having predetermined shapes, shades, and sizes. Wax is applied (2) and (3) to the incisal veneer to create a wax buildup onto a model (4) or prefabricated coping (5). Subsequently, a sprue is attached to the applied wax (2) and (3) and the wax buildup is removed from the model (4) for investing and burnout to create a lost wax mold. For a crown with a substructure the incisal veneer , (1) and the coping (5) are both cast in place with press ceramic press , thermoplastic material, or by injecting a curable resin composite, or epoxy , material …
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 March 25, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 25, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 25, 2024.
- 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.