Method for treatment of waste water
CA 1301965 C · Owner: Mitsui, Kiichiro · Inventors: Mitsui, Kiichiro; Terui, Sadao; Kanzaki, Toshihide
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Efficient treatment of waste water is accomplished by subjecting the waste water to wet oxidation under continued supply of an oxygen containing gas at a temperature of not more than 370°C under pressure enough for the waste water to retain the liquid phase thereof intact, in the presence of a catalyst (excluding a molded monolithic catalyst having plural through holes) containing a composite oxide of at least two metals selected from the group consisting of Ti, Si, and Zr and at least one metal selected from the group consisting of Mn Fe, Co, Ni, W, Cu, Ce, Ag, Pt, Pd, Rh, Ru and Ir or a compound of the one, metal mentioned above.
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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
- Granted May 26, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 26, 2009.
- 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.