Serial column cryogenic rectification system for producing high purity nitrogen
CA 2268312 A1 · Owner: Vincett, Mark Edward · Inventors: Bonaquist, Dante Patrick; Potempa, Kevin John; Vincett, Mark Edward
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A serial column system for producing relatively large quantities of both high purity nitrogen gas and high purity nitrogen liquid using a first column producing the high purity gas and a second column producing the high purity liquid, with second column top fluid refluxing the first column.
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 April 7, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 7, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 7, 2021.
- 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.