Process for treating industrial wastewaters by activated sludge
CA 1197633 A · Owner: Nippon Steel Corporation · Inventors: Fujii, Masahiro; Kamada, Minoru; Matsubara, Shigeharu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for activated sludge treatment of industrial wastewaters is disclosed. The process uses in the aeration tank of an activated sludge treatment plant at least one member of the group consisting of phytic acid phytate salts and materials containing the same as well, as at least one of the other phosphorus-containing compounds.
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
- Granted December 3, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 3, 2002.
- 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.