Impermeable wall construction
CA 1085633 A · Owner: Piccagli, Ugo · Inventors: Piccagli, Ugo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of constructing an impermeable wall in the ground having no joints is disclosed. The method overcomes the problems of forming an impermeable joint between a series of individually dug slots. The improvement includes excavating at least one portion of trench in the ground at a width and depth required for the wall, replacing excavated material from the trench with bentonite-water slurry, and after completing the excavation, replacing a predetermined amount of the bentonitewater slurry with cement. The cement is mixed with the remaining bentonite-water slurry in the one portion of trench to produce an evenly mixed cement-bentonite-water slurry. After this slurry has gelled, the above …
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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
- Granted September 16, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 16, 1997.
- 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.