Removal of metal soaps from hydrogenated fatty products
CA 2029496 C · Owner: Lok, Cornelis M. · Inventors: Van Dijk, Pieter M.; Lok, Cornelis M.; Van Den Berg, Hendrikus J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention provides a process for removing fatty acid metal soaps derived from metals with an atomic number from 27 to 29 from hydrogenated fatty products comprising separating solid metal precipitated under the influence of hydrogen at a pressure ranging between 0.05 and 10 MPa from the hydrogenated fatty products. Preferably the hydrogen pressure is between 0.2 and 5 MPa. Preferably the metal is nickel. It is recommended to effect the separation by filtration, using a filter comprising vertical pressure leaves. Also it is possible to treat the hydrogenated fatty product with hydrogen under a pressure between 0.05 and 10 MPa before separating the metal from the fatty product.
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 November 16, 1990 and granted February 24, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 16, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 16, 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.