Interproximal floss brush
CA 2255693 C · Owner: Harada, Stephen D. · Inventors: Harada, Stephen D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A dental hygiene device for cleaning enlarged embrasures includes a brush portion (14) having a plurality of bristles (18) projecting from a rigid spine (28) opposed ends of which are secured to lengths of flexible filaments (34 36) such as dental floss. A free end of at least one of the filaments may be provided with a stiff pin-like tip (44) useful as a toothpick or in threading the device through gaps between teeth or orthodontic structures.
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 April 23, 1997 and granted June 6, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 23, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 23, 2019.
- 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.