Process for the preparation of propylene oxide
CA 2414779 A1 · Owner: Rieber, Norbert · Inventors: Rudolf, Peter; Teles, Joaquim Henrique; Bassler, Peter
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 method for the production of propylene oxide in the presence of methanol, during which propylene oxide is separated off from a mixture, comprising propylene oxide and methanol and the resulting mixture comprising methanol is worked up. The invention is characterised in that on working up, methanol is separated from a mixture containing methanol and methyl formate.
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 July 5, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 5, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 5, 2023.
- 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.