Fuel cell and method of manufacturing same using chemical/mechanical planarization
CA 2444520 A1 · Owner: Herman, Gregory S. · Inventors: Mardilovich, Peter; Herman, Gregory S.; Champion, David
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of making a fuel cell includes the following steps. A pattern is placed on a base surface to create a predetermined topography on the base surface. An anode layer, a cathode layer and/or an electrolyte layer is/are deposited over the pattern. Areas of higher topography are removed from areas of lower topography using chemical mechanical planarization to form a predetermined fuel cell structure.
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 October 9, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 9, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 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.