Method for conditioning an edge of an internal electric conductive film of a cathode ray tube
CA 1063162 A · Owner: Nippon Electric Glass Company · Inventors: Mizoguchi, Hiroshi; Nakagawa, Isamu; Wada, Masamichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A D.C. voltage is applied between an anode terminal and stem pins of a cathode ray tube using the anode terminal as a negative terminal to cause cathode spot at an edge of an internal electric conductive film of the cathode ray tube. Thus the internal, electric conductive film is so conditioned that the dielectric breakdown strength of a glass neck tube of the cathode ray tube may be graded up.
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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 September 25, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 25, 1996.
- 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.