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Expired Canadian patentCanada

Venting device for forming lead-acid battery plates

CA 1101930 A · Owner: Lucas Industries Limited · Inventors: Raban, Victor J.; Bant, John 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

A device for use in the formation of lead-acid battery plates comprises a hollow, elongated body which at one end is formed with a hole communicating with the bore in the body and is adapted for insertion into the filling and venting aperture of a battery lid. A closure member is provided at the other end of the body and is formed with an opening to allow gases generated during formation to vent to atmosphere. Moreover, baffle means is provided in the bore in the body so as to lie in the path of the gases flowing through the bore in use and thereby assist in removing acid entrained in said gases.

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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 May 26, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 26, 1998.
  • 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 13, 1978
GrantedMay 26, 1981
Term endedMay 26, 1998
Patent numberCA 1101930 A
Classification (IPC)H01M4/20 +2 more

Timeline

Timeline From CIPO dates

1979198119831985198719891991199319951997Application filedJan 13, 1978Patent grantedMay 26, 1981Term endedMay 26, 1998

Sources & verification

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