Color cathode-ray tube having a heat dissipative electron reflective coating on a color selection electrode
CA 1312911 C · Owner: Rca Licensing Corporation · Inventors: Deal, Samuel B.; Bartch, Donald W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
RCA 83,606, ABSTRACT OF THE DISCLOSURE A color cathode-ray tube comprises an evacuated envelope having an electron gun for producing at least one electron beam, and preferably three beams a phosphor, screen, and a shadow mask adjacent to the screen. The mask has an improved heat dissipative, electron reflective coating on its electron gun-facing surface to minimize the effects of overall mask doming and blister warpage. The coating comprises a compound selected from the group consisting of bismuth (tri)oxide-potassium silicate and tungsten-potassium silicate. The method of making the coating comprises forming an aqueous suspension of the compound and spraying a plurality of layers of the …
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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 January 19, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 19, 2010.
- 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.