Trowel enhancement for sliding form
CA 2238626 C · Owner: Labonte, Hubert · Inventors: Labonte, Hubert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and device for making a concrete street curb at the entrance to a dwelling place place of business and so forth. The sides and top of the said curb can be straight inclined or a combination of the two. The invention comprises a form the top of which is mobile and can be inclined the sides of which are parallel and vertical and the bottom section of which has one or two inclined sides each at its own angle. The mobile top has curved corners which give the concrete curb preformed radial lines.
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 July 24, 1998 and granted November 20, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 24, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 24, 2020.
- 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.