Selective monoepoxidation of styrene, styrene analogs, and styrene derivatives to the corresponding oxide with molecular oxygen
CA 2002242 C · Owner: Eastman Chemical Company · Inventors: Monnier, John Robert; Muehlbauer, Peter James
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Process is disclosed for the selective mono-epoxidation of styrene, styrene analogs and styrene, derivatives. Such compounds are contacted with an oxygen-containing gas in the presence of a promoted optionally supported silver catalyst under defined reaction conditions, thereby selectively producing epoxides in good yield.
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 6, 1989 and granted September 5, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 6, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 6, 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.