Concrete slat molding machine with a mechanism to agitate the metal bars and with leakage protection
CA 2251772 A1 · Owner: Dupuis, Bruno · Inventors: Dupuis, Bruno
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A machine for molding concrete slats, a process for molding same and a concrete slat manufactured therefrom. The machine includes an agitating means consisting essentially of a reinforced rod network connected to a shaft which in turn is connected to an oscillating means. The machine also includes a shock absorbing means which may be made of rubber. The concrete slat obtain from said machine is one having a rectangular shape and a plurality of openings. The openings contain dull edges.
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 November 13, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 13, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 13, 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.