Toothbrush with multiple rotary brush members
CA 2013095 C · Owner: Branford, Eleanor M. · Inventors: Branford, William G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A toothbrush having one or more wheel members with radially disposed bristles adapted to roll into contact with tooth surfaces. End plates on the wheel member inhibit bristle deflection. In a multiple wheel member version an intermediate wheel member serves to confine bristles against displacement. Side plates carry a spindle for the wheel member or members. A curved guard extends partially about the wheel members.
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 26, 1990 and granted December 21, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 26, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 26, 2012.
- 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.