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Expired Canadian patentCanada

Ignition system with enhanced combustion and fault tolerance

CA 1332438 C · Owner: Ford Motor Company · Inventors: Boyer, Wesley D.

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

22-, Abstract of the Disclosure, An ignition system having a first primary coil magnetically coupled only to a first secondary coil and a second primary coil magnetically coupled only to a second secondary coil. The secondary coils are electrically coupled to the output terminals through a didode steering circuit for connecting both secondary coils in voltage-aiding series such that the sum of the voltages on both secondary coils is coupled across the output terminals when both primary coils are simultaneously actuated, only the first secondary coil is coupled across the output terminals when only the first primary coil is actuated; and only the second secondary coil is coupled across the …

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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 October 11, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 11, 2011.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 31, 1989
GrantedOctober 11, 1994
Term endedOctober 11, 2011
Patent numberCA 1332438 C
Classification (IPC)F02P3/04 +2 more

Timeline

Timeline From CIPO dates

19901993199619992002200520082011Application filedJuly 31, 1989Patent grantedOct 11, 1994Term endedOct 11, 2011

Sources & verification

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