Process for producing propylene oxide
CA 2403524 A1 · Owner: Sumitomo Chemical Co. Ltd. · Inventors: Omae, Toshikazu; Oku, Noriaki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for producing propylene oxide characterized in that it comprises , the following steps and the isopropylbenzene hydroperoxide to be subjected to the epoxidization step has not undergone a heat history including heating at a temperature (t) represented by the following equation (1): t ( ) = 150 -0.8 x w or at a higher temperature (w is the content (wt.%) of isopropylbenzene hydroperoxide in the isopropylbenzene hydroperoxide solution.) Oxidation step: a step in which isopropylbenzene is oxidized to obtain isopropylbenzene hydroperoxide. Epoxidization step: a step in which the isopropylbenzene hydroperoxide obtained in the oxidation step is reacted with propylene to obtain …
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 March 19, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 19, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 19, 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.