Reticulated and controlled porosity battery structures
CA 2729504 C · Owner: Massachusetts Institute Of Technology · Inventors: Hellweg, Benjamin; Chiang, Yet-Ming
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An energy storage device comprises a first electrode a second electrode, a , first , current collector in electronic communication with the first electrode a , second current , collector in electronic communication with the second electrode and an , electrolyte in ionic , communication with the first and second electrodes. The first electrode includes a portion , having an average porosity and an ionically interconnected porosity that increases in a , direction from the current collector with which the electrode is in electrical communication , toward the other electrode or current collector to define a porosity gradient. The porosity at , each extreme of the gradient is at least 10% …
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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 October 22, 2001 and granted February 10, 2015. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 22, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 22, 2023.
- 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.