Evacuation apparatus for use during dental abrasion procedures
CA 2307335 A1 · Owner: Chang, Shu Kun · Inventors: Berry, Stephen D.; Ayzenshteyn, Mikhail; Quintana, Reynaldo Jose
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Evacuation apparatus for collecting particulates generated during dental procedures and, in particular, air abrasion procedures. The evacuation apparatus has a vacuum pump for creating a suction flow and a filter located upstream of the pump. The evacuation apparatus incorporates a cyclone separator upstream of the filter which removes abrasive tooth, and other , material from the suction flow thereby increasing filter life and allowing the apparatus to function at full suction flow for longer periods of time. The apparatus can be used with an evacuation hand piece which provides both intra- and extra-oral evacuation to reduce the mess generated during air abrasion dental …
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 July 30, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 30, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 30, 2020.
- 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.