US2733371A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internally conducttvely coated
Assignee: —
•
Filing: —
•
Granted: 1956-01-31
•
Expires: 1973-01-31
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:41
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/54; H01J61/545
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
AN ELECTRIC DISCHARGE DEVICE OF THE LOW PRESSURE POSITIVE COLUMN TYPE COMPRISING AN ELONGATED VITREOUS LIGHT-TRANSMITTING ENVELOPE CONTAINING AN IONIZABLE MEDIUM INCLUDING AN INERT GAS AT A PRESSURE OF A FEW MILLIMETERS AND A SMALL QUANTITY OF MERCURY, A PAIR OF MAIN COILED FILAMENTARY THERMIONIC ELECTRODES, ACTIVATED WITH ELECTRONEMMISIVE MATERIALS, SEALED INTO OPPOSITE ENDS OF SAID ENVELOPE, LEAD-IN WIRES CONNECTED TO ONE SIDE OF SAID MAIN ELECTRODES TO PROVIDE CURRENT TERMINALS, A PAIR OF AUXIALLIARY COILED FILAMENTARY ACTIVATED ELECTRODES OF SUBSTANTIALLY LOWER THERMAL CAPACITY THAN SAID MAIN ELECTRODES AND RESPECTIVELY CONNECTED TO THE OTHER SIDE OF SAID MAIN ELETRODES AND PHYSICALLY DISPLACED THEREFROM, AND A LOW RESISTANCE TRANSPARENT COATING COVERING SUBSTANTIALLY THE WHOLE INSIDE SURFACE OF SAID ENVELOPE.
Claim 2
Dependent Claim
118 words
AN ELECTRIC DISCHARGE DEVICE OF THE LOW PRESSURE POSITIVE COLUMN TYPE COMPRISING AN ELONGATED VITREOUS LIGHT-TRANSMITTING ENVELOPE CONTAINING AN IONIZABLE MEDIUM INCLUDING AN INERT GAS AT A PRESSURE OF A FEW MILLIMETERS AND A SMALL QUANTITY OF MERCURY, A PAIR OF MAIN COILED FILAMENTARY THERMIONIC ELECTRODES, ACTIVATED WITH ELECTRONEMMISIVE MATERIALS, SEALED INTO OPPOSITE ENDS OF SAID ENVELOPE, LEAD-IN WIRES CONNECTED TO ONE SIDE OF SAID MAIN ELECTRODES TO PROVIDE CURRENT TERMINALS, A PAIR OF AUXIALLIARY COILED FILAMENTARY ACTIVATED ELECTRODES OF SUBSTANTIALLY LOWER THERMAL CAPACITY THAN SAID MAIN ELECTRODES AND RESPECTIVELY CONNECTED TO THE OTHER SIDE OF SAID MAIN ELETRODES AND PHYSICALLY DISPLACED THEREFROM, AND A LOW RESISTANCE TRANSPARENT COATING COVERING SUBSTANTIALLY THE WHOLE INSIDE SURFACE OF SAID ENVELOPE.
References Cited (Backward Citations)
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Cited
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Cited
US2042147A
Cited
US2064369A
Cited
US2291965A
Cited
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Cited
US2306925A
Cited
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Cited
US2429420A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-30 | 1959-08-01 | 1960-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-30 | 1963-08-01 | 1964-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-30 | 1967-08-01 | 1968-01-31 | $7700.00 | Window Closed / Lapsed |