Planar display apparatus having a surface insulated substrate with a plurality of electron-passing holes
CA 2035366 C · Owner: Suzuki, Ryo · Inventors: Suzuki, Ryo; Hoshinouchi, Susumu; Ohira, Takuya
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A planar display apparatus comprises an electron emission source for emitting electrons to a phosphor screen provided on the inside of a sealed container a, surface insulated substrate disposed between the electron emission source and the phosphor screen and provided with a plurality of electron-passing holes extending through the surface insulated substrate, each of the electronpassing holes having an inner wall surface forming a part of the surface insulated substrate, and control electrodes composed of a plurality of separate conductive films which are formed on the surface insulated substrate and to which a passing electron controlling potential is applied, the inner wall surfaces of …
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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 January 31, 1991 and granted July 2, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 31, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 31, 2013.
- 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.