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Expired Canadian patentCanada

Gels as battery separators for soluble electrode cells

CA 1080303 A · Owner: The Government Of The United States As Represented By The Administrator Of The National Aeronautics And Space Administration · Inventors: Gahn, Randall F.; Sheibley, Dean W.

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

Gels are formed from silica powders and hydrochloric acid. The gels can then be impregnated into a polymeric foam and the resultant sheet material can then be used in applications where the transport of chloride ions is desired Specifically, disclosed is the utilization of the sheet in electrically rechargeable redox flow cells which find application in bulk power storage systems.

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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

  • Granted June 24, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 24, 1997.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Filed—
GrantedJune 24, 1980
Term endedJune 24, 1997
Patent numberCA 1080303 A
Classification (IPC)H01M6/22 +2 more

Timeline

Timeline From CIPO dates

198119831985198719891991199319951997Patent grantedJune 24, 1980Term endedJune 24, 1997

Sources & verification

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