Composite membranes and their manufacture and use
CA 1333237 C · Owner: Union Carbide Corporation · Inventors: Nelson, Joyce Katz; Bikson, Benjamin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for producing a composite hollow fiber membrane by coating a porous hollow fiber substrate with a dilute solution of a membraneforming composition containing a membrane-forming material and a solvent therefor by contacting the porous hollow fiber substrate with the composition partially evaporating some of the solvent from the coated porous hollow fiber substrate, contacting the partially dried coating porous hollow fiber substrate with a coagulant and recovering the composite hollow fiber membrane. Also included are the composite hollow fiber membranes so produced and their use as permeable membranes for separating at least one fluid from at least one other fluid in a fluid …
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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 29, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 29, 2011.
- 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.