Method, apparatus and system for removal of contaminants from water
CA 2577086 C · Owner: Presby, David W. · Inventors: Presby, David W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a water de-contamination system methods, and apparatus using , alternating aerobic anaerobic, and aerobic conditions, with carbon and other waste processing treatments, to remove contaminants from water. Included is an aerobic system (16) in flow communication with an outlet from a waste tank (14); waste processing treatments (28) in flow communication with liquid exiting the aerobic system and in which anaerobic conditions can be created; means for creating and maintaining anaerobic conditions either within the waste processing treatments or after fluid exits the waste processing treatments; means for return of the fluid into aerobic conditions (40). A fluid retaining …
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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
- Filed August 23, 2004 and granted October 23, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 23, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 23, 2026.
- 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.