Saw tooth for circular saw
CA 2120595 C · Owner: Palfy, Nick · Inventors: Savard, Laurier; Mitchell, Robert E.; Maclennan, Charles D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A saw tooth for a circular saw for a feller including in one embodiment, a square saw tooth head having a frusto-pyramidal shape to be mounted on a holder and the saw tooth head includes seats for receiving inserts. The inserts are provided with cut- ting tips and cutting edges while a clamp nut retains the inserts against the tooth head. When the edges and tips are worn or damaged from impact the inserts are first replaced. When the seat of the head is damaged the tooth can be rotated.
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 5, 1994 and granted March 25, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 5, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 5, 2016.
- 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.