Vacuum distillation process
CA 2009571 C · Owner: Hamer, Johannes A. · Inventors: Hamer, Johannes A.; Van Der Heijden, Pieter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Vacuum distillation process comprising introducing a feed which contains liquid hydrocarbons and vaporous hydrocarbons into an inlet section (3) of a distillation column (1) operating at a subatmospheric pressure removing liquid, from a bottom section (6) of the distillation column (1) allowing vapour to pass through three condensation sections (13b, 13a and 13) arranged above each other in the distillation column (1) between the inlet section (3) and a top section (8) removing vapour from the top section (8) spraying into each, condensation section (13 13a and 13b) cooled liquid, and, removing liquid from each condensation section (13 13a and, 13b), wherein the cooled liquid which is …
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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 8, 1990 and granted June 13, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 8, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 8, 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.