Biofiltering device for treating wastewater
CA 2304935 C · Owner: Le Groupe Berger Ltee/Berger Group Ltd. · Inventors: Belhumeur, Albert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A biofiltering device for treating wastewater comprises a housing having an inlet for receiving the wastewater to be treated and an outlet for discharging the treated wastewater, a bed of peat disposed inside the housing between the inlet and outlet, the peat defining a biofiltering medium having a predetermined biofiltering capacity, and an air vent for aerating the peat. The, device further includes a fluid flow control system arranged over the bed of peat and in fluid flow communication with the inlet for distributing the, wastewater through the bed of peat in a manner such that when the wastewater enters the system at a flow rate greater than the biofiltering capacity of the peat, the …
Read the whole patent
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 April 10, 2000 and granted July 29, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 10, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 10, 2022.
- 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.