Tubular footing form for building foundation piles of concrete
CA 2033806 A1 · Owner: Visconti, Roberto · Inventors: Visconti, Roberto
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
TUBULAR FOOTING FORM FOR BUILDING FOUNDATION PILES OF CONCRETE", Abstract, A tubular footing form of the recoverable type for building concrete foundation piles comprises an end shutting organ destined to prevent water from the water bed from entering the footing form while the latter is being plunged into the ground and to enable the concrete casting to be performed during the step of recovery of the same footing form. According to the invention said end shutting organ, is installed inside the tubular footing form at a certain distance from its free end so as to create a seal chamber which, during the step of plunging of the footing form gets filled with compacted earth, which forms a plug …
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 January 8, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 8, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 8, 2013.
- 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.