A toothbrush
CA 2261722 C · Owner: Shenton, Simon Philip · Inventors: Solanki, Sanjay Amratlal; Shenton, Simon Philip
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A toothbrush having a handle (4) and a head (1) the head (1) being of length , L and having longitudinal and transverse axes the head (1) having a bristle-, bearing surface (7) with a plurality of tufts (6) extending therefrom wherein , the tufts (6) are arranged in a plurality of groups N which are separated , from each other by a transverse gap (8) of from 1.3 mm to 5 mm the distance , between tufts (6) within a group being less than 1.3 mm and wherein at least , 50 % of the tufts (6) are characterized by there being no other tuft (6) within 1.3 mm, measured along a line parallel to the transverse axis for at , least 50 % of the width of the tuft (6). Preferably each group is in the form …
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 August 1, 1997 and granted May 20, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 1, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 1, 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.