Gas-filled discharge tube
CA 2019604 C · Owner: Wakabayashi, Seiichi · Inventors: Yagi, Kiyoshi; Wakabayashi, Seiichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A gas-filled discharge tube for voltage control particularly for the series gap of the ignition system of an automotive spark-ignition engine. The gas-filled discharge tube is capable of operating stably at a sufficiently high discharge inception voltage requires a sufficiently, low discharge sustaining voltage and is capable of accurately controlling the ignition timing of the automotive spark-ignition engine regardless of the variation of the output voltage of the ignition coil of the ignition system. The gas-filled discharge tube is provided with discharge electrodes meeting requirements that the opposite surfaces of the discharge electrodes are substantially flat the discharge elec-, …
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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
- Filed June 22, 1990 and granted March 1, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 22, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 22, 2012.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.