Process for the continuous preparation of propylene glycols
CA 2493707 A1 · Owner: Bassler, Peter · Inventors: Teles, Joaquim Henrique; Bassler, Peter; Goebbel, Hans-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 method for the continuous production of propylene glycols, characterised in comprising steps (i) to (iii): (i) reaction of propylene with hydrogen peroxide to give propylene oxide with propylene glycols obtained as a by-product, (ii) reaction of the propylene oxide obtained in step (i) with water to give propylene glycols (iii) isolation of , the propylene glycols obtained in steps (i) and (ii).
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 22, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 22, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 22, 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.