Tooth brushes
CA 2005113 C · Owner: Barman, Rolf · Inventors: Barman, Rolf
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for producing a tooth brush (10') with at least three head portions (13, 14, 15) which are mutually, separated from each other in pairs by means of an intermediate cavity (11, 12). The head portions (13-15) are angled relative to each other about an axis (14a 15a), parallel to an associated cavity (11 12) after associated, bristle groups (19) are fixed in place and after a local heating of the tooth brush head is effected. The tooth brush head (lOa) is subjected to a local heating at the bottom (11a,12a) of each of the cavities (11,12) in, that a heat conducting means (21) is introduced into each cavity (11, 12) for heating the cavity at the bottom of same. The angling is effected …
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 December 11, 1989 and granted September 20, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 11, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 11, 2011.
- 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.