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Expired Canadian patentCanada

Composite material

CA 1298154 C · Owner: Enirisorse S.P.A. · Inventors: Vittadini, Italo; Tangerini, Ilario; Guerriero, Renato

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

The invention relates to a composite material comprising a base made of lead or of lead alloy which is porous or spongy and whose pore cavities are at least partly filled with a resin, which is solid at room temperature such as, for example, araldite. This composite material is particularly useful to make electrodes for batteries.

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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 March 31, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 31, 2009.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 16, 1985
GrantedMarch 31, 1992
Term endedMarch 31, 2009
Patent numberCA 1298154 C
Classification (IPC)B32B5/18 +2 more

Timeline

Timeline From CIPO dates

19861989199219951998200120042007Application filedMay 16, 1985Patent grantedMarch 31, 1992Term endedMarch 31, 2009

Sources & verification

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