US3090882A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron gun
Assignee: RCA Corp
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Filing: 1960-04-13
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Granted: 1963-05-21
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Expires: 1980-04-13
Abstract
No abstract record available.
Inventors
- 👤 Robert E Benway
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:33
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/46; H01J29/58; H01J29/62; H01J29/622; H01J29/624
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
AN ELECTRON GUN COMPRISING AXIALLY ALIGNED CATHODE, CONTROL, SCREEN, FOCUSING, AND ACCELERATING ELECTRODES NEXT ADJACENT TO EACH IN THE ORDER NAMED; SAID SCREEN ELECTRODE COMPRISING A CENTRALLY APERTURED CUP OPEN TOWARD SAID FOCUSING ELECTRODE; SAID FOCUSING ELECTRODE COMPRISING A TUBULAR MEMBER OPEN AT BOTH ENDS; SAID ACCELERATING ELECTRODE COMPRISING A TUBULAR MEMBER HAVING A TRANSVERSE END SECTION ADJACENT SAID FOCUSING ELECTRODE, SAID END SECTION HAVING AN APERTURE THEREIN; THE DIAMETER OF SAID FOCUSING ELECTRODE BEING LARGER THAN THE DIAMETER OF SAID SCREEN ELECTRODE CUP AND BEING AT LEAST APPROXIMATELY EQUAL TO THE AXIAL DISTANCE BETWEEN THE ENDS OF SAID SCREEN AND ACCELERATION ELECTRODES CLOSEST TO SAID CATHODE.
Claim 2
Dependent Claim
107 words
AN ELECTRON GUN COMPRISING AXIALLY ALIGNED CATHODE, CONTROL, SCREEN, FOCUSING, AND ACCELERATING ELECTRODES NEXT ADJACENT TO EACH IN THE ORDER NAMED; SAID SCREEN ELECTRODE COMPRISING A CENTRALLY APERTURED CUP OPEN TOWARD SAID FOCUSING ELECTRODE; SAID FOCUSING ELECTRODE COMPRISING A TUBULAR MEMBER OPEN AT BOTH ENDS; SAID ACCELERATING ELECTRODE COMPRISING A TUBULAR MEMBER HAVING A TRANSVERSE END SECTION ADJACENT SAID FOCUSING ELECTRODE, SAID END SECTION HAVING AN APERTURE THEREIN; THE DIAMETER OF SAID FOCUSING ELECTRODE BEING LARGER THAN THE DIAMETER OF SAID SCREEN ELECTRODE CUP AND BEING AT LEAST APPROXIMATELY EQUAL TO THE AXIAL DISTANCE BETWEEN THE ENDS OF SAID SCREEN AND ACCELERATION ELECTRODES CLOSEST TO SAID CATHODE.
References Cited (Backward Citations)
US2922072A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-05-20 | 1966-11-19 | 1967-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-20 | 1970-11-19 | 1971-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-20 | 1974-11-19 | 1975-05-21 | $7700.00 | Window Closed / Lapsed |