Composition and method for making fuel cell collector plates with improved properties
CA 2498157 A1 · Owner: Cai, Yuqi · Inventors: Cai, Yuqi; Fisher, John; Chopra, Divya
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and composition is disclosed for making conductive flow field separator plates having reduced resistivity lower weight and lower cost. The , plates are made by blending from about 0.5 wt% to about 40 wt% preferably , from about 1 wt% to about 30 wt% most preferably from about 5 wt% to about 20 wt%, of the liquid crystal polymer; from about 0.5 wt% to about 40 wt% preferably from about 1 wt% to about 30 wt% most preferably from about 5 wt% , to about 20 wt% of the poly(styrene-co-maleic anhydride); and from about 20 wt% to about 99 wt%, preferably from about 60 wt% to about 98 wt% most , preferably from about 70 wt% to about 90 wt% of the conductive filler. The blend is then …
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
- Filed September 9, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 9, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 9, 2025.
- 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.