A method for the start-up of an epoxidation process and a process for the epoxidation of an olefin
CA 2494767 C · Owner: Rekers, Dominicus Maria · Inventors: Lockemeyer, John Robert; Evans, Wayne Errol; Te Raa, Arend Jan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for the start-up of a process for the epoxidation of an olefin which , method comprises contacting a catalyst bed comprising a silver-based highly selective epoxidation catalyst, or a precursor of the catalyst comprising the silver in cationic form, with a feed comprising oxygen at a temperature of the catalyst bed above 260 ~C for a period of at most 150 hours and subsequently , decreasing the temperature of the catalyst bed to a value of at most 260 ~C and a process for the epoxidation of an olefin which process comprises , contacting a catalyst bed comprising a silver-based highly selective epoxidation catalyst, or a precursor of the catalyst comprising the silver in …
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 June 24, 2003 and granted July 17, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 24, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 24, 2025.
- 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.