Ammonia recovery
CA 2359930 A1 · Owner: Zhuang, Yan · Inventors: Zhuang, Yan; Johnson, Gary Donald
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for the recovery of ammonia from an ammonia sulphate solution the , process comprising the method steps of: combining ammonium sulphate solution and quicklime (CaO) in a milling means to provide a reaction slurry; and running the milling means whereby the milling action of thereof acts to break up any gypsum precipitate as it forms in the reaction slurry or milling means.
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 12, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 12, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 12, 2022.
- 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.