US3136911A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High vacuum display device
Assignee: Tung Sol Electric Inc
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Filing: 1961-12-27
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Granted: 1964-06-09
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Expires: 1981-12-27
Abstract
No abstract record available.
Inventors
- 👤 Fred F Crawford
- 👤 Alexander H Hanna
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:21
CPC Classifications
H; H01; H01J; H01J31/00; H01J31/08; H01J31/10; H01J31/12; H01J31/15; H01J17/00; H01J17/38; H01J17/48; H01J17/49; H01J2893/00; H01J2893/0069
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A HIGH VACUUM DISPLAY DEVICE COMPRISING, A CYLINDRICAL EVACUATED TRANSPARENT ENVELOPE CONTAINING A PLURALITY OF ANODES AND TWO CATHODES, EACH OF SAID ANODES CONNECTED TO A LEAD-IN CONDUCTOR AND EACH FORMED IN A DISTINCTIVE SYMBOLIC MANNER, EACH OF SAID ANODES INCLUDING A CONDUCTOR SURROUNDED BY A FLUORESCENT COATING, ONE OF SAID CATHODES INCLUDING AN ELONGATED ELECTRON EMITTING SURFACE MOUNTED AT RIGHT ANGLES TO THE AXIS OF THE ENVELOPE, THE OTHER OF SAID CATHODES INCLUDING AN ELONGATED ELECTRON EMITTING SURFACE MOUNTED SUBSTANTIALLY PARALLEL TO THE TUBE AXIS, AND ELECTRICAL MEANS FOR HEATING BOTH CATHODES.
Claim 2
Dependent Claim
93 words
A HIGH VACUUM DISPLAY DEVICE COMPRISING, A CYLINDRICAL EVACUATED TRANSPARENT ENVELOPE CONTAINING A PLURALITY OF ANODES AND TWO CATHODES, EACH OF SAID ANODES CONNECTED TO A LEAD-IN CONDUCTOR AND EACH FORMED IN A DISTINCTIVE SYMBOLIC MANNER, EACH OF SAID ANODES INCLUDING A CONDUCTOR SURROUNDED BY A FLUORESCENT COATING, ONE OF SAID CATHODES INCLUDING AN ELONGATED ELECTRON EMITTING SURFACE MOUNTED AT RIGHT ANGLES TO THE AXIS OF THE ENVELOPE, THE OTHER OF SAID CATHODES INCLUDING AN ELONGATED ELECTRON EMITTING SURFACE MOUNTED SUBSTANTIALLY PARALLEL TO THE TUBE AXIS, AND ELECTRICAL MEANS FOR HEATING BOTH CATHODES.
References Cited (Backward Citations)
US2891184A
Cited
US2957098A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-09 | 1967-12-09 | 1968-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-09 | 1971-12-09 | 1972-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-09 | 1975-12-09 | 1976-06-09 | $7700.00 | Window Closed / Lapsed |