US3663857A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron emitter comprising metal oxide-metal contact interface and method for making the same
Assignee: Avco Corp
•
Filing: 1969-02-13
•
Granted: 1972-05-16
•
Expires: 1989-02-13
Abstract
Abstract The electron emitter herein disclosed comprises a tubular glass capillary substrate, on the interior of which is deposited an indium-doped tin oxide film. Gold ohmic contacts embrace the ends of the capillary, traversing the end edges and overlapping both the exterior of the capillary and the end margins of the film. A high-resistance region exists at the interface between at least one of the contacts and the oxide. It is formed by applying increased voltage across the contacts until there is a current increase independently of applied voltage, followed by a decrease in film conductivity.
Inventors
- 👤 Arthur M Soellner
- 👤 James F Sprouse
- 👤 Triponithura A Raju
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:59
CPC Classifications
H; H01; H01J; H01J1/00; H01J1/02; H01J1/30; H01J1/316; H01J3/00; H01J3/02; H01J3/021; G; G05; G05B; G05B2219/00; G05B2219/20; G05B2219/23; G05B2219/23203
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US3107177A
Cited
US3333141A
Cited
US3264074A
Cited
US3252829A
Cited
US3479551A
Cited
US3558966A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |