Removal of metallic contaminants from a hydrocarbonaceous liquid
CA 2030278 C · Owner: Aldridge, Clyde L. · Inventors: Bearden, Roby Jr.; Riley, Kenneth L.; Aldridge, Clyde L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of reducing the concentration of metal contaminants, such as vanadium and nickel in a, petroleum distillate or other hydrocarbonaceous liquid is disclosed. The method comprises demetallizing the distillate over an activated-carbon supported vanadium catalyst.
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 19, 1990 and granted January 11, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 19, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 19, 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.