Cathode ray tube
CA 1193644 A · Owner: Sony Corporation · Inventors: Suzuki, Teruyasu; Kojima, Toshihisa; Tamura, Michio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A cathode ray tube having a panel portion provided with, a phosphor screen on its inner surface a neck portion provided, with an electron gun in its inner space and a funnel portion, combined with the panel portion and the neck portion to provide an envelope, in which the electron beam emitted from the electron gun scans the phosphor screen and produces images and the images, are observed from the beam scanning side of the phosphor screen. In the cathode ray tube a thin metal oxide layer is formed on the beam scanning side of the phosphor screen.
Read the whole patent
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 17, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 17, 2002.
- 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.