Method for fabricating an electrode substrate
CA 1106115 A · Owner: United Technologies Corporation · Inventors: Nagle, Dennis C.; Christner, Larry G.; Watson, Paul R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a method for fabricating porous carbon articles. In accordance with the invention the method comprises the steps of coating chopped carbon fibers with a low viscosity mixture of at least 70% by weight furfuryl alcohol, 0.25 - 5%,by weight of an aqueous, solution of 85% phosphoric acid or an equivalent amount of phosphoric acid, and a balance of water. A mat of coated fibers is then formed, and the furfuryl alcohol is polymerized and the mat is cured by heating the mat to a temperature between 50° - 200°C. The cured mat is carbonized by heating to at least 1500°C. in either an inert atmosphere or a vacuum.
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 August 4, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 4, 1998.
- 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.