High utilization supported catalytic metal containing gas-diffusion eelctrode, process for making it, and cells utilizing it
CA 2085577 A1 · Owner: Anderson, Everett B. · Inventors: Reddy, N.R.K. Vilambi; Anderson, Everett B.; Taylor, Earl J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Gas-diffusion electrodes (GDE's) are obtained by starting with a GDE which is fully fabricated except for electrocatalytic metal treatment and solid polymer electrolyte (s.p.e.) treatment. This untreated GDE is treated by a) impregnating an s.p.e. solution into the catalytic face until the solution penetrates part way into the cross-section of the GDE support material but not as far as , the hydrophobic, gas permeable face b) inserting the, thus-treated GDE and a counterelectrode into a plating bath containing M+, M++, and/or M+++ ions, where M is a metal of Group VIII or I-B of the Periodic Table, and c) applying an interrupted current to the thus-treated GDE, so metal particles < 10 nm …
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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
- Filed August 12, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 12, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 12, 2013.
- 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.