Method for producing alkylene glycol
CA 2310835 A1 · Owner: Basf Aktiengesellschaft · Inventors: Gehrer, Eugen; Stein, Bernd; Grosch, Georg Heinrich
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 producing alkylene glycol or a mixture of two different alkylene glycols, wherein a reaction mixture containing at least one alkylene oxide or a mixture of two or more different alkylene oxides, a catalyst and water are made to react. The catalyst can not be dissolved in the reaction mixture and has at least one covalently linked acid functional group and at least one covalently linked basic functional group. The invention also relates to a moulded body with at least one acid group and at least one basic functional group, whereby the functional groups are covalently linked to the support.
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 18, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 18, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 18, 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.