Membrane drying process and system
CA 2053189 A1 · Owner: Praxair Technology, Inc. · Inventors: Prasad, Ravi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, Enhanced air drying or other gas purifications are achieved using purge gas rather, than product gas, to facilitate permeation in membrane systems having substrates adapted to achieve radial mixing and having countercurrent flow patterns and uniform flow of gas over the surface of the membranes. D-16,359
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 10, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 10, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 10, 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.