Effluent treatment system
CA 2009752 C · Owner: Carty, Brocan · Inventors: Coffey, Patrick J.; Weldon, Michael T.; Kavanagh, Richard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An effluent treatment system 1, 70, 80 for treating effluent which has passed through a primary treatment step such as a septic tank 50 comprises a container 5 having inlets 7 for effluent and outlets 8 for filtered effluent. The container 5 contains a biological treatment medium 41 comprising a homogeneous mixture of young Sphagnum peat and an organic peat fibre. The medium 41 is covered by a layer 40 of peat fibre for distributing the effluent and another layer 44 of peat fibre is provided below the medium 41 to induce flow of treated effluent to the outlets 34.
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 February 9, 1990 and granted September 22, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 9, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 9, 2012.
- 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.