Membrane system for treating sanitary wastewater
CA 2266637 A1 · Owner: Mullerheim, Steven B. · Inventors: Mullerheim, Steven B.; Roy, Guy W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A system for treating sanitary wastewater using membrane filtration is disclosed. Designed principally for complete on-site sewage treatment and disposal, the system separates wastewater into permeate (22) and concentrate (23) components by membrane separation subsystem (32); then dries disinfects, and deodorizes the concentrate (23) component by a variety of methods to render it reusable or more easily stored and disposed. The permeate (22) component is discharged or reused as is or is further treated to render it , disposable or reusable for particular applications. Alternatives for treating the concentrate (23) component include mixing with alkaline admixtures and composting with …
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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 September 22, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 22, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 22, 2019.
- 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.