Sediment detoxification using an organic amendment
CA 2126511 C · Owner: Her Majesty The Queen In Right Of Canada As Represented By The Minister Of Environment Canada · Inventors: Murphy, Thomas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There is disclosed a method of detoxifying sediment containing polynuclear aromatic hydrocarbons and petroleum hydrocarbons wherein a chemical oxidant is added to a sediment containing microbes in combination with the addition of an organic amendment to enhance natural biodegradation of the abovementioned compounds. The method additionally provides for compaction of the sediment depth by enhanced production of methane gas as a reaction by-product.
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 June 22, 1994 and granted November 10, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 22, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 22, 2016.
- 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.