Apparatus and method for removing contaminants from water
CA 2070957 A1 · Owner: Shurtleff, Edward C. · Inventors: Shurtleff, Edward C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
BP File No. 3968-043, - 18 -, ABSTRACT OF THE DISCLOSURE The apparatus has a chamber including a burner. Contaminated water is supplied to the chamber and, vaporized. Simultaneously, any oil-based contaminants in the water are combusted or consumed, with excess air being supplied for this purpose. The water vapour and combustion products exit the chamber and may be condensed to recover the water. The water than contains a sufficiently low concentration of oil-based contaminants that it may be discharged.
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 June 10, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 10, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 10, 2014.
- 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.