Microporous polyester membranes and polymer assisted phase inversion process for making same
CA 1047718 A · Owner: Gelman Sciences Inc. · Inventors: Kesting, Robert E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A microporous membrane is disclosed which is suitable as a membrane filler in liquid permeation microfiltration and, ultra filtration in reverse osmosis as a porous support, substrate or for another reverse osmosis membrane in, electrophoresis, curtain electrophoresis thin layer, gas or, liquid chromatography or as a substrate for enzyme attachment. The membrane consists essentially of a polyester resin of the general formula, wherein a is an integer of at least 3 and not greater than 7 and n is an integer greater than about 45.
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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 February 6, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 6, 1996.
- 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.