Process for the separation of carbon dioxide
CA 2002085 C · Owner: Schuurmans, Hubertus Johanna Adrianus · Inventors: Schuurmans, Hubertus Johanna Adrianus; Bitter, Johan George Albert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a process for the separation of carbon dioxide gas from a mixture comprising components resulting from the reaction of ethylene and oxygen under the influence of a silver catalyst wherein the separation is carried out by absorption of the carbon dioxide gas into a wall of a membrane, solubilization in the membrane matrix diffusion through the membrane and desorption from the other wall.
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 November 2, 1989 and granted December 28, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 2, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 2, 2011.
- 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.