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Expired Canadian patentCanada

Storage battery half-cell and materials therefore

CA 1324409 C · Owner: Stork Screens B.V. · Inventors: Sonneveld, Pieter Jan

CIPO record

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

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Abstract From the Canadian patent

Electrode material for use in a storage battery half-cell containing a suspension, storage battery half-cell having an electrode of such material and a storage battery comprising such a storage battery half-cell. Described is an electrode material for use in a storage battery half-cell of the type in which a suspension of particles of active material circulates. Upon charging such a half cell the electrode material according to the application prevents the formation of a strongly adhering precipitate of active material, such as zinc, on the electrode material. The electrode material comprises for that purpose at least at, its surface, an electrically conducting ceramic material. The …

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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 November 16, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 16, 2010.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledFebruary 24, 1989
GrantedNovember 16, 1993
Term endedNovember 16, 2010
Patent numberCA 1324409 C
Classification (IPC)H01M4/66 +2 more

Timeline

Timeline From CIPO dates

1990199319961999200220052008Application filedFeb 24, 1989Patent grantedNov 16, 1993Term endedNov 16, 2010

Sources & verification

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