Controlled oxidation of hydrocarbons to intermediate oxidation products
CA 2331663 A1 · Owner: Eustathios, Vassiliou · Inventors: Eustathios, Vassiliou; Dassel, Mark W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to methods of controlling the oxidation of hydrocarbons to respective intermediate oxidation products e.g. dibasic acids, by , adjusting the bulk temperature of the liquid mixture under oxidation by a cooling element, the temperature of which is maintained above a temperature at which solids deposit on the element or a second liquid phase is formed on the element, and/or by maintaining the oxygen concentration in the condenser offgases to a level preferably lower than 90 % by volume of the flammable oxygen concentration, and/or by feeding oxygen and inert gas (preferably nitrogen) in the reaction zone, the inert gas and the oxygen having a ratio of inert gas to …
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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 April 15, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 15, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 15, 2021.
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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.