Method of preventing subsoil water contamination
CA 1090594 A · Owner: Morfeldt, Carl-Olof · Inventors: Morfeldt, Carl-Olof
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, A method for preventing the contamination of subsoil water by harmful substances originating from a product or a plant or other installation disposed at a predetermined place or locality above or below the ground characterized in that in the area of said place, one or more cavities are established in the ground at a level below the natural subsoil water level so that a sink funnel is formed, that the liquid coming into said cavities are drained away from said cavities for further treatment, the draining of said liquid being carried out in such a manner and to such an extent that in the region above the cavities the velocity of movement of the water in the ground …
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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 December 2, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 2, 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.