Switching valve for multi-chamber adsorbent air and gas fractionation system
CA 2267013 C · Owner: United Dominion Industries, Inc. · Inventors: Tsargorodski, Mikhail; Thelen, John E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A unique switching valve for use with a mufti-chamber adsorbent air and gas fractionation system for controlling the flow of fluid which comprises a valve housing, including an inlet port, two outlet ports and an exhaust port and first valve and second valve, members in the valve housing which are moveable between a first position and second, position for alternately permitting and blocking fluid flow between the inlet port and the, outlet ports and between the outlet ports and the exhaust port. The first and second valve, members include means for permitting a predetermined controlled flow of fluid between the, inlet port and the outlet ports and means for permitting a predetermined …
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 March 25, 1999 and granted July 2, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 25, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 25, 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.