Brush section for an electric toothbrush
CA 2224336 C · Owner: Driesen, Georges · Inventors: Driesen, Georges; Kressner, Gerhard
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 a brush section for an electric toothbrush in which a handle section is connectible with the brush section. A disk-shaped bristle carrier at the end of the brush section remote from the handle section has on its upper side bristle tufts disposed on one central ring and one outer ring. The bristle carrier is rotatable about an axis of rotation in an alternating oscillating fashion from a central position. The axis of rotation is aligned at approximately right angles to a longitudinal center line of the brush section. In use of the electric toothbrush, an improved cleaning action is accomplished in that the outer ring of the bristle carrier is set with tufts of …
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 June 12, 1996 and granted April 15, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 12, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 12, 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.