Catalyst based on palladium, cadmium, alkali metal and lanthanoids and process for preparing vinyl acetate
CA 2313644 A1 · Owner: Celanese Chemicals Europe Gmbh · Inventors: Herzog, Bernhard; Wang, Tao; Nicolau, Ioan
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 catalyst which contains palladium and/or compounds thereof, cadmium compounds, alkali metal compounds and at least one lanthanoid metal. The invention also relates to the utilization of the catalyst in order to produce vinyl acetate from acetic acid ethylene and oxygen or gases , containing oxygen.
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 December 2, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 2, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 2, 2020.
- 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.