Removing hydrogen sulphide from a gas mixture
CA 2000573 C · Owner: Van Baar, Johannes Franciscus · Inventors: Van Baar, Johannes Franciscus; Van Lith, Walterus Jacobus
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Process for removing hydrogen sulphide from a gas mixture including hydrogen sulphide comprising contacting the gas mixture with a liquid absorbent composition including an aminopyridine such as, 4-dimethylaminopyridine.
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 12, 1989 and granted August 8, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 12, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 12, 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.
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.