Cleaning tool, especially for dental use
CA 1285160 C · Owner: Kofod, Finn · Inventors: Kofod, Finn
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In order to remove plaque and other coatings on teeth, especially down in the gingival pockets and thereby prevent and cure paradentosis a cleaning, body (1) is applied, said body being mounted on a rotary shaft. The body (1) is at its end provided with curved ribs (3) in the hollow space (8) said, ribs (3) having triangular cross sections. The frontmost side face (5) in the direction of rotation (4) of the ribs (3) slopes forward to form a scraping edge which can wipe the tooth face, and which can lead the removed material towards the centre (9) of the body. In order to make room for the removed material the ribs (3) extend to a point a distance removed from the centre, whereby is produced …
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
- Granted June 25, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 25, 2008.
- 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.