Method for preparing cleaved products from castor oil or derivatives thereof
CA 2280967 A1 · Owner: Totah, Thomas S. · Inventors: Totah, Thomas S.; Ries, Charles D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for producing a cleaved product from castor oil or derrivatives , thereof, by high temperature caustic oxidation reaction accomplished by combining at least one chemically inert diluent a catalyst, and an alkali in , aqueous solution to form a first mixture wherein the diluent is present in an amount sufficient to reduce foaming and solidification of the mixture while increasing the yield and improving the purity and adding a ricinic compound to the first mixture to form a second mixture. The temperature of the second mixture is raised to a level sufficient to conduct pyrolysis and the cleaved , product produced thereby is recovered by adding an acid to the reaction mixture …
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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 February 11, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 11, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 11, 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.