US3720781A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High voltage slewing of penetration tube gun
Assignee: RTX Corp
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Filing: 1971-11-10
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Granted: 1973-03-13
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Expires: 1991-11-10
Abstract
Abstract MAINTAINED AT A CONSTANT HIGH VOLTAGE POTENTIAL, WHEREAS THE SHIELD AND THE GUN ARE SLEWED MANY KILOVOLTS BETWEEN HIGH VOLTAGES SO AS TO PROVIDE VARIABLE TO PENETRATION OF THE CRT BEAM IN ORDER TO EXCITE SELECTED PHOSPHORS. THE ELECTRON GUN OF A MULTIPLE PENETRATION TYPE CATHODE RAY TUBE IS COMPLETELY SURROUNDED BY A SHIELD WHICH HOUSES CIRCUITRY FOR OPERATING THE GUN WITH POTENTIALS REFERENCED TO THE SHIELD. THE CIRCUITRY IS COUPLED THROUGH HIGH VOLTAGE ISOLATION TO EXTERNAL CIRCUITRY SUCH AS POWER SOURCES AND A SOURCE OF VIDEO. THE ANODE OF THE CRT IS
Inventors
- 👤 R West
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:04
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/12; H04N9/16; H04N9/22; H04N9/27
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-12 | 1976-09-11 | 1977-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-12 | 1980-09-11 | 1981-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-12 | 1984-09-11 | 1985-03-13 | $7700.00 | Window Closed / Lapsed |