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Expired Canadian patentCanada

Grids for electric storage batteries

CA 1215741 A · Owner: Chloride Group Public Limited Company · Inventors: Hayes, Michael H.; Pearson, Ernest J.

CIPO record

Overview

Drawings and full text

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

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Abstract From the Canadian patent

A grid array for use in assembling a multicell electric battery comprises a plurality of grids 11 12, preferably arranged in two spaced parallel lines adapted to provide a plate for every cell of the battery. Each grid is connected to one or more adjacent grids by a combination of integral bridge pieces 14 and sufficient temporary links 15 to maintain all the grids of the array in their desired configuration.

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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 December 23, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 23, 2003.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledOctober 28, 1983
GrantedDecember 23, 1986
Term endedDecember 23, 2003
Patent numberCA 1215741 A
Classification (IPC)H01M50/54 +2 more

Timeline

Timeline From CIPO dates

1984198619881990199219941996199820002002Application filedOct 28, 1983Patent grantedDec 23, 1986Term endedDec 23, 2003

Sources & verification

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