Injection molding method and apparatus for preparing dental prosthesis and medical devices
CA 2120880 A1 · Owner: Dong, Shuojia · Inventors: Seghatol, Marc; Dong, Shuojia
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The disclosure describes an injection molding station for a diaphragm cartridge for use in preparing dental prosthesis and medical devices in general. The cartridge and corresponding machine allow for complete injection of thermoplastic resin. The cartridge is a predominantly cylindrical flat cartridge with a conical opening. Plastic resin is ejected from the opening in the cartridge when a heated plunger is pushed on the bottom of the cartridge. During the injection of the resin into the flask, the bottom of the cartridge is deformed to eliminate the bursting of the cartridge. The cartridge is utilized in a station in which the cartridge is positioned in a tubular heating chamber with …
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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 April 8, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 8, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 8, 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.