Ion exchange membrane reinforced with perfluoropolymer leno cloth
CA 1266020 C · Owner: Ishii, Tsuneji · Inventors: Ono, Haruyasu, (Deceased); Ito, Hiroaki; Ishii, Tsuneji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A perfluorocarbon-type ion exchange resin membrane reinforced with a reinforcing cloth for the electrolysis of an alkali metal halide, characterized in that said reinforcing cloth is a leno cloth with the warp and weft yarns made of perfluoropolymer fiber; the warp yarns have from 20 to 100 deniers; the weft yarns have from 40 to 200 deniers; the warp density is from 26 to 80 yeans/inch; the weft density is from 13 to 50 yarns/inch; and the cross-sectional flat ratio of each yarn is from 0.9 to 0.1.
Read the whole patent
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 20, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 20, 2007.
- 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.