Method of recovering substantially pure co2 from a fermentation gas
CA 2094926 A1 · Owner: Van Oeveren, Pieter W. · Inventors: Jansen, Karel R.J.; Van Oeveren, Pieter W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to a method of recovering substantially pure CO2 from a fermentation gas polluted with organic compounds and with sulphur compounds, which method comprises washing the gas with water or an aqueous solution under such conditions that the gas contains no more than 2.5, preferably no more than 1.25 ppm organic impurities, oxidizing the oxidizable impurities removing the major part of the water, and drying the CO2 to the desired water content.
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 24, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 24, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 24, 2013.
- 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.