Process for making highly permeable coated composite hollow fiber membranes
CA 1324738 C · Owner: Air Products And Chemicals, Inc. · Inventors: Puri, Pushpinder S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention is a process for applying a highly permeable coating on a hollow fiber substrate. The hollow fiber substrate is continuously passed through a polymeric coating solution and withdrawn from the solution through a coating die to form a uniform polymeric solution coating on the outer surface of the hollow fiber. A portion of the solvent from the coating is allowed to evaporate thereby forming a thin dense surface, layer after which the remaining solvent from the coating layer is leached out. The resultant material is a highly permeable coated composite hollow, fiber membrane which can be used in gas and/or liquid separations.
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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 November 30, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 30, 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.