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Expired Canadian patentCanada

Gradient interface composites and methods therefor

CA 2222618 C · Owner: Amarasinghe, Sudath · Inventors: Tinoco, Flavio; Zook, Lois Anne; Amarasinghe, Sudath

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Abstract From the Canadian patent

Magnetic composites exhibit distinct flux properties due to gradient interfaces. The composites can be used to improve fuel cells and batteries and effect transport and separation of different chemical species. Devices utilizing the composites include a separator an electrode (804) for , channeling flux of magnetic species an electrode (804) for effecting , electrolysis of magnetic species a system for channeling electrolyte species a system for separating particles with different magnetic susceptibilities improved fuel cells, batteries, and oxygen concentrators. Some composites can be used to make a separator for distinguishing between two species of materials and a flux switch to …

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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 June 7, 1996 and granted January 1, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 7, 2016.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 7, 2018.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 7, 1996
GrantedJanuary 1, 2002
Term endedJune 7, 2016
Patent numberCA 2222618 C
Classification (IPC)H01M4/86 +2 more

Timeline

Timeline From CIPO dates

1997199920012003200520072009201120132015Application filedJune 7, 1996Patent grantedJan 1, 2002Term endedJune 7, 2016

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.