Cryogenic rectification system for lower pressure operation
CA 2129596 A1 · Owner: Potempa, Kevin John · Inventors: Potempa, Kevin John; Smolarek, James
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A double column cryogenic rectification system wherein lower pressure column bottoms undergo additional rectification within a once-through downflow reflux condenser by countercurrent direct contact flow with vapor generated by condensing higher pressure column shelf vapor enabling the higher pressure column to operate at a reduced pressure thus reducing feed compression power requirements.
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 August 5, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 5, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 5, 2016.
- 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.