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Expired Canadian patentCanada

Bistable storage cathode ray tube, storage target therefor and method of making same

CA 1082763 A · Owner: Tektronix, Inc. · Inventors: Haven, Duane A.

CIPO record

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Abstract From the Canadian patent

Abstract of the Disclosure A bistable storage cathode ray tube wherein the bistable storage target thereof has a conductive layer provided on an insulating support member the conductive, layer including a multiplicity of collector electrode members having insulating material covering at least the collector electrode members except for an outer area thereof. A layer of storage dielectric material is provided along the conductive layer and the insulated collector electrode members extend through the layer of dielectric material. The exposed conductive area of the collector members collect secondary electrons emitted from written areas of the dielectric layer and provide a substantially …

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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 July 29, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 29, 1997.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 29, 1977
GrantedJuly 29, 1980
Term endedJuly 29, 1997
Patent numberCA 1082763 A
Classification (IPC)H01J31/58 +2 more

Timeline

Timeline From CIPO dates

1978198019821984198619881990199219941996Application filedJune 29, 1977Patent grantedJuly 29, 1980Term endedJuly 29, 1997

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