Use of zeolites and alumina in adsorption processes
CA 2230775 C · Owner: Air Products And Chemicals, Inc. · Inventors: Taylor, Fred William; Allam, Rodney John; Kalbassi, Mohammed Ali
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for the adsorption of at least carbon dioxide water and oxides of, nitrogen and preferably acetylene from a feed gas comprises contacting the feed gas, with an adsorbent mixture of a zeolite and an alumina. The process may be operated as a swing adsorption process comprising contacting said gas with said adsorbent at a first temperature and pressure to adsorb at least carbon dioxide water and oxides of, nitrogen therefrom and periodically regenerating said adsorbent by reducing the pressure and or increasing the temperature to which the adsorbent is exposed.
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 2, 1998 and granted August 28, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 2, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 2, 2020.
- 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.