Water treatment process
CA 2331275 C · Owner: Tvt Us Corporation · Inventors: Hausin, Volker A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for treating a body water to purify it. In this process a portion of the water to be treated is continuously caused to flow at a rate of at least about 60 feet per minute and is continuously agitated aerated, and fed into a biochamber within which are disposed at least five distinct strains of microorganisms. A screen is disposed in the biochamber below the microorganisms and air is forced through such screen during the processing of the water.
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 January 17, 2001 and granted August 12, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 17, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 17, 2023.
- 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.