Method for improving the phosphorus elimination capacity of a lake
CA 1292330 C · Owner: Verner, Bo L. · Inventors: Ripl, Wilhelm K.; Verner, Bo L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of improving the phosphorus elimination capacity of a lake. A flexible wall is extended from the bottom of the lake a substantial distance toward the surface of the lake at the beginning of the vegetation period of the lake to separate the lower parts of a minor portion of the lake from the lower parts of the rest of the lake. Sheets are positioned between an inlet channel and the flexible wall as growth areas for algae. The flexible wall is lowered around the end of the vegetation period to allow the flushing away of sedimented algae from the bottom of the minor portion of the lake.
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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 November 19, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 19, 2008.
- 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.