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Expired Canadian patentCanada

Multicell electric storage battery with combined means for waste-gas drying and flame-protection

CA 1265190 C · Owner: Metz, Hans-Ulrich · Inventors: Metz, Hans-Ulrich; Buder, Eckart; Ubermeier, Dieter

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

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Abstract From the Canadian patent

21894-396, Abstract of the Disclosure, In a multicell electric storage battery designed for central gas release, before being released into the open air the battery gases pass through a container positioned on the block casing in which the acid particles and moisture are separated from the gases as a consequence of the gases being repeatedly deflected by a series of walls placed in the path of the gases which may be, perforated if desired, and the dehumidified gases are then passed through a porous flame-protection frit. Flashback of a flame caused by external ignition of the gases is prevented by rapid burn-off of the gases in a flame extinguishing chamber preceding the frit.

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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 January 30, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 30, 2007.
  • 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 29, 1986
GrantedJanuary 30, 1990
Term endedJanuary 30, 2007
Patent numberCA 1265190 C
Classification (IPC)H01M2/12 +1 more

Timeline

Timeline From CIPO dates

1987199019931996199920022005Application filedJan 29, 1986Patent grantedJan 30, 1990Term endedJan 30, 2007

Sources & verification

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