Dewaxing of dried oil
CA 2015661 C · Owner: Unilever Plc · Inventors: Asbeck, Lutz S.; Segers, Jacobus C.
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 dewaxing oil comprising the steps of:, i) drying the oil to a water content of less than 0.5% by wt;, ii) cooling the dried oil at a cooling rate of less than 15°C per hour and at a temperature difference between the oil and the coolant medium of less than 15°C to an, oil end temperature being in the range of 2-10°C; and iii) removing the solid wax formed by microfiltration.
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 April 27, 1990 and granted April 4, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 27, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 27, 2012.
- 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.