Electrically powdered cleansing apparatus
CA 2192476 C · Owner: Braun Aktiengesellschaft · Inventors: Haczek, Werner; Boland, Bernhard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention is directed to an electrically powered dental cleansing apparatus (1) in which a cleansing implement (19) is coupled to a drive sleeve (11) and adapted to be rotated about a longitudinal axis (4). According to the invention the coupling, is effected by means of a resilient element in particular a, spring (21) which includes a slip coupling (27) and/or a buffer zone (28). Under normal conditions, the slip coupling (27) provides a non-rotative connection between the drive sleeve (11) and the cleansing implement (19). However in the event of the, cleansing implement (19) seizing in an interproximal space for, example, the slip coupling (27) will slip thus avoiding poten-, tial …
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 14, 1996 and granted September 14, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 14, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 14, 2018.
- 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.