Multiple air layer waste water processing system
CA 1330240 C · Owner: Nojima, Hisatake · Inventors: Nojima, Youko; Nojima, Hisatake
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a tank provided with number of partition plates horizontally, a small pipe is placed per each partition plate. An inlet to produce a liquid to be treated is provided at the top portion of the tank and an outlet for treated water and a gas hole for sending gas such as oxygen are additionally equipped at the end of the tank. The liquid to be treated is purified by retaining oxygen in numerous layers to enlarge the contact area of the oxygen with the liquid to be treated. Furthermore a new system, namely water flow is set up in, which the liquid to be treated is introduced from the inlet and the water flow is generating using rotating blades driven by a motor placed in the center between …
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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 June 14, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 14, 2011.
- 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.