Copolymers and diaphragms made therefrom
CA 1085993 A · Owner: Oronzio De Nora Impianti Elettrochimici, S.P.A. · Inventors: De Nora, Vittorio; Spaziante, Placido; Giuffre, Luigi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Novel sulfonated copolymers formed by copolymerization of a halogenated monomer containing at least one fluorine atom and a monomer of the formula , wherein X is an electron attracting group activating the hydrogen atom in the .alpha.-position so that the hydrogen may be replaced with a sulfonic group and Y is selected from the group consisting of hydrogen, methyl and ethyl and their preparation novel diap-, hragms made therefrom, a diaphragm cell equipped with a diaphragm made of said sulfonated copolymer and to a method of electrolysis.
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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 September 16, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 16, 1997.
- 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.