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Expired Canadian patentCanada

Secondary battery

CA 1291527 C · Owner: Noding, Stephen A. · Inventors: Siegel, Sanford A.; Noding, Stephen A.

CIPO record

Overview

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

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Abstract From the Canadian patent

This invention relates to a secondary battery comprised of a polymer film and first and second collector plates. The polymer film comprises a polymer, a plasticizer for the polymer an epoxidized, vegetable oil, graphite and a salt disassociatingly, solubilized by the plasticizer. The salt has the formula MXa, wherein X is chloride, bromide or iodide, M is a metal ion having a reduction-oxidation potential greater than that of X, and a is the oxidation number of M.

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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 October 29, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 29, 2008.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJanuary 28, 1988
GrantedOctober 29, 1991
Term endedOctober 29, 2008
Patent numberCA 1291527 C
Classification (IPC)H01M10/05

Timeline

Timeline From CIPO dates

1989199119931995199719992001200320052007Application filedJan 28, 1988Patent grantedOct 29, 1991Term endedOct 29, 2008

Sources & verification

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