Roofing machine
CA 2260670 A1 · Owner: Leal, Antonio · Inventors: Leal, Antonio; Small, Jeffrey; Leal, Arinaldo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A roofing machine is provided with a self propelled chassis and a scoop tool mounted to a front end of the chassis for collecting loose materials from a roof surface. A conveyor is mounted to the chassis in operative connection with the scoop tool to convey material from the scoop tool to a desired location. In a further embodiment a blade tool is, provided for interchanging with the scoop tool. The blade tool has a blade for dislodging material from the roof surface.
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 4, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 4, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 4, 2021.
- 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.