Two-phase ammoximation
CA 2412833 A1 · Owner: Degussa Ag · Inventors: Leininger, Stefan; Herwig, Jurgen; Oenbrink, Georg
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 preparing oximes from ketones or aldehydes, hydrogen peroxide and ammonia the reaction being carried out, in a system of one aqueous phase and one phase of hydrocarbons inert under the reaction conditions in the presence of at least one interphase. contactor and a catalyst system which consists of at least two components one component of the catalyst system being present in heterogeneous form and being based on titanium, silicon and oxygen and one other component being a homogeneously dissolved or suspended ammonium salt.
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 26, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 26, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 26, 2024.
- 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.