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Expired Canadian patentCanada

Automatically preionized double-sided lc inversion circuit

CA 1287890 C · Owner: Stuart, Gregory C. · Inventors: Houtman, Hubert; Stuart, Gregory C.; Meyer, Jochen

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

Abstract of the Disclosure, A high voltage high current pulse amplifier. First, and second series-connected capacitors are connected in parallel across third and fourth series-connected capacitors. A voltage source is connected in parallel across the first and second capacitors. A first port of a load is connected between the first and second capacitors, and a second port of the load is connected between the third and fourth capacitors. The first and third capacitors are positioned adjacent one another on a first side of the load; and, the second and fourth capacitors are positioned adjacent one another on a second side of the load opposite the first side. The load is preionized via a spark …

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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 August 20, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 20, 2008.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 28, 1988
GrantedAugust 20, 1991
Term endedAugust 20, 2008
Patent numberCA 1287890 C
Classification (IPC)H03F11/00 +1 more

Timeline

Timeline From CIPO dates

1989199119931995199719992001200320052007Application filedApril 28, 1988Patent grantedAug 20, 1991Term endedAug 20, 2008

Sources & verification

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