Multi-leaf membrane module
CA 1320141 C · Owner: Imperial Oil Limited · Inventors: Thompson, John A.; Hafez, Mahmoud M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Described is a membrane apparatus having particular application in hydrocarbon processes such, as separating ketone dewaxing solvent from a hydrocarbon process stream. The apparatus contains a pressure resistant compartment containing flattened tubular membranes in a parallel stack arrangement separated by retentate spacers. Internally each tube contains permeate spacers for solvent outflow which permeate spacers extend the full length of the tubular membrane. The end of the tubes are not separated by retentate spacers and are clamped together such that solvent exits via the permeate spacers, while the clamping assembly design prevents the cocurrent exit of solution from the high pressure …
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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
- Granted July 13, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 13, 2010.
- 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.