Continuous process to separate colour bodies and/or asphalthenic contaminants from a hydrocarbon mixture
CA 2463760 A1 · Owner: Shell Internationale Research Maatschappij B.V. · Inventors: Geus, Eduard Rudolf; Cederlof, Gro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Continuous process to separate colour bodies and/or asphalthenic contaminants from a hydrocarbon mixture by passing part of the hydrocarbon mixture through a membrane over which membrane a pressure difference is maintained thereby obtaining ä hydrocarbon permeate having a reduced content of colour bodies and/or contaminants, wherein at regular time intervals the pressure difference over the membrane is substantially lowered.
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 October 18, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 18, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 18, 2024.
- 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.