Plant based system for abatement of gaseous ammonia contamination
CA 2447381 A1 · Owner: Richard, Stefan · Inventors: Darlington, Alan Blake; Richard, Stefan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The air in a room can be cleaned of ammonia by passing the air through green plants grown, hydroponically. The air passes through a falling curtain of droplets of the hydroponic water, whereby the ammonia goes into solution in the water. Microbes colonised on the roots of the, green plants break down the ammonia in the hydroponic water and assimilate , the nitrogen, into the plant tissue.
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 October 29, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 29, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 29, 2025.
- 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.