Innovative inclined plane earth engaging tool
CA 2296836 C · Owner: Watts, Cleal T. · Inventors: Watts, Cleal T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The Inclined plane (22) is a earth engaging tool arranged and constructed to be used as one or several in a set of inclined planes (22). A structural implement (28) replacing the sharp pointed lip (Fig 3) and teeth (30) arranged with one or a set of inclined planes (22) can be constructed and arranged for optimum encounter of earth excavation to fracture cleave, and uplift earth usually, but not always in unison. An expected application would be found on a dragline shovel, a loader type bucket, or other earth engaging implement. It is a robust one piece, ascending, rectangular, durable metal slope arranged at approximately 50 degrees of encounter. Its thickness is 5% to 10% of its length …
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 February 7, 2000 and granted March 25, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 7, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 7, 2022.
- 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.