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Expired Canadian patentCanada

Glow-plug connection system for motor-independent liquid fuel heaters for motor vechicles

CA 1318944 C · Owner: Reiser, Peter · Inventors: Steiner, Peter; Reiser, Peter; Langen, Herbert

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

In order to provide uniform glow plugs for auxiliary heaters for motor vehicles independent of the line voltage (e.g. 12 volts or 24 volts) without having to use multiplier resistors with certain line voltages, a glow plug has two heating rods and three electrical terminals, so that depending on the line voltage the heating rods can be connected in parallel with a 12 volt device or in series with a 24 volt device and always the same electrical and thermal output is generated. 11

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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 June 8, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 8, 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.
FiledMay 19, 1989
GrantedJune 8, 1993
Term endedJune 8, 2010
Patent numberCA 1318944 C
Classification (IPC)F23Q7/08 +1 more

Timeline

Timeline From CIPO dates

1990199319961999200220052008Application filedMay 19, 1989Patent grantedJune 8, 1993Term endedJune 8, 2010

Sources & verification

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