Air separation
CA 2058883 A1 · Owner: Acharya, Divyanshu Rasiklal · Inventors: Acharya, Divyanshu Rasiklal
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Air Separation, Air is compressed in a first compressor 2 and has carbon dioxide and water vapour removed therefrom in a purification apparatus 4. The air is then cooled by passage through main heat exchangers 6 and 8 to a temperature suitable for its separation by rectification. The cooled air is separated in a single rectification column 16. Liquid oxygen is withdrawn from the column 16 by a pump 34 and is passed through the heat exchangers 8 and 6 countercurrently to the air stream and is thereby vaporised, a high pressure gaseous oxygen product thus being formed. Nitrogen vapour is withdrawn from the top of the column 6 through an outlet 20 is warmed by passage through a further heat …
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 7, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 7, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 7, 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.