Process for denitrifying water using metallic iron and installation for implementing same
CA 2073216 A1 · Owner: Welte, Benedicte · Inventors: Welte, Benedicte; Montiel, Antoine
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Process for denitrifying water using metallic iron and installation for implementing same. ABSTRACT OF THE DISCLOSURE Process for denitrifying water, characterized in that it essentially consists in bringing the water to be treated into contact with a bed of metallic iron and in passing it subsequently through a filter bed suitable for the establishment of a biofilm of ferrobacteria and denitrifying bacteria, without its coming into contact with the air. Application to water denitrification in a plant or directly in the soil. No drawing.
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 July 6, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 6, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 6, 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.