Dental instrument
CA 2340128 A1 · Owner: Bornstein, Rolf · Inventors: Bornstein, Rolf; Ericson, Dan; Carlsson, Lennart
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a dental instrument for removing caries attacked dentine in connection with chemical-mechanical treatment of caries by means of a caries-dissolving solution applied to the caries for loosening the caries tooth substance. The instrument comprises a tool head (1) with a number of scraping edges or bristles (2, 5, 9) for scraping away the loosened caries tooth substance. In the spacings (2', 9') formed therebetween drops of the gel solution used for the chemical-mechanical treatment can be carried (transported) up to the tooth treatment site. In contrast to previous scraping instruments of this type the instrument is power-driven in order to provide the tool …
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 26, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 26, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 26, 2021.
- 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.