Device for aerating sewage water
CA 2196230 C · Owner: Uwe, Sonnenrein · Inventors: Uwe, Sonnenrein
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a method and a device for sewage purification sewage is, purified by continuously passing it through several stages of treatment, wherein the passage of sewage is regulated by a process control device and is monitored by sensors. Treatment ensues in physical processing stages pre-flotation, stages, two-step biological clarification stages and one post-flotation stage. The pre-flotation stages as well as the biological clarification stages are each provided with gas-water mixers, and the pre-flotation stages the, biological clarification stages and the post-flotation stage are provided with solid foam separators having outlet channels. Clear water from a clear water overflow basin is …
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 27, 1995 and granted October 6, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 27, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 27, 2017.
- 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.