Pasty dental veneer material
CA 1340145 C · Owner: Dentsply G.M.B.H. · Inventors: Konetzka, Joerg; Goerlich, Karl J.; Bauer, Fritz U.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A heat cured pasty veneer material, used primarily in dentistry, is provided. The material is resistant or immune to interdental cracks while in use as a veneer on, for example, crowns and bridges. The material is heat cured at about 115°C for about 15 minutes in conventional heat curing apparatus. In the illustrated embodiment the pasty dental material comprises about 10-90% polymerizable urethane-acrylic monomer, about 0-80% inorganic fillers (coarse) about, 5-60% pyrogenic silica (microfine) about 0.2-10% heat, activated polymerization initiators and about 0-70%, fractured particles of polymerized organic fillers.
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
- Granted November 24, 1998. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 24, 2015.
- 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.