Hockey stick
CA 2107967 C · Owner: Dutchburn, Leslie G. · Inventors: Dutchburn, Leslie G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The hockey stick is provided with a recess formed at its lower edge of the blade. The recess eliminates ice build up on the front surface of the blade and relieves the air resistance and erratic buffeting of the blade when the latter is swung at a high speed against the puck. The front surface of the blade also slopes upwardly and rearwardly to enhance the release of air resistance build up on the blade. A resilient bumper is provided at the front end of the blade to safeguard against wear and tear of such end as well as minimizing accidental injury to the players hit by the blade.
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 October 7, 1993 and granted February 11, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 7, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 7, 2015.
- 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.