Recycle for supercritical carbon dioxide
CA 2463941 A1 · Owner: Howard, Henry Edward · Inventors: Billingham, John Frederic; Howard, Henry Edward
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and a system for supplying a carbon dioxide fluid feed from a carbon dioxide purifying means to one or more applications. The feed is combined with contaminants at the applications to form an effluent and at least one , effluent is returned to the purifying means for recycling the carbon dioxide. Carbon dioxide from a carbon dioxide source is combined with the carbon dioxide of the system so that the purity of the carbon dioxide from the source is upgraded prior to the applications.
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 17, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 17, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 17, 2024.
- 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.