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US4554482A
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DC Type gas discharge display panels
Assignee: Okaya Electric Industry Co Ltd
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Filing: 1981-11-16
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Granted: 1985-11-19
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Expires: 2001-11-16
Abstract
Abstract A DC gas discharge display panel is described, having a cathode which is formed by depositing a metal and/or a metal compound on a substrate of the DC gas discharge display panel or a cathode substrate by the application of plasma spray utilizing plasma generated by the discharge of a rare gas, or a mixed gas of a rare gas and hydrogen and/or nitrogen.
Inventors
- 👤 Takeo Kamegaya
- 👤 Satoshi Watanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:35
CPC Classifications
H; H01; H01J; H01J17/00; H01J17/02; H01J17/04; H01J17/06; H01J17/38; H01J17/48; H01J17/49
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
48 words
A DC type gas discharge display panel having a cathode comprised of a mixture of a tetra- or hexa-boride of a rare earth element or a mixture thereof, and molybdenum, tungsten, aluminum with a thin film of aluminum oxide provided on the surface thereof, or a mixture thereof.
Claim 2
Dependent Claim
48 words
A DC type gas discharge display panel having a cathode comprised of a mixture of a tetra- or hexa-boride of a rare earth element or a mixture thereof, and molybdenum, tungsten, aluminum with a thin film of aluminum oxide provided on the surface thereof, or a mixture thereof.
Claim 3
Dependent Claim
31 words
A DC type gas discharge display panel having a cathode comprised of a tetra- or hexa-boride of a rare earth element, or a mixture thereof, and oxides of rare earth elements.
Claim 4
Dependent Claim
31 words
A DC type gas discharge display panel having a cathode comprised of a tetra- or hexa-boride of a rare earth element, or a mixture thereof, and oxides of rare earth elements.
Claim 5
Dependent Claim
65 words
A DC type gas discharge display panel, as claimed in claim 2, wherein said cathode further comprises at least one of the materials comprising oxides of alkaline earth metal elements, composite compounds of oxides of alkaline earth metal elements and molybdenites, tungstates, aluminates of alkaline earth metal elements, molybdenum, and tungsten and aluminum with a thin film of aluminum oxide provided on the surface thereof.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-11-18 | 1989-05-20 | 1989-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-18 | 1993-05-20 | 1993-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-18 | 1997-05-20 | 1997-11-19 | $7700.00 | Window Closed / Lapsed |