Patent US3117248A successfully refreshed from Google Patents.
US3117248A
Expired / Lapsed
US
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Low pressure mercury vapor discharge lamp for direct current operation
Assignee: General Electric Co
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Filing: 1961-05-18
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Granted: 1964-01-07
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Expires: 1981-05-18
Abstract
No abstract record available.
Inventors
- 👤 William H Lake
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:57
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/04; H01J61/10; H01J61/103; H01J61/70; H01J61/72
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
A LOW PRESSURE MERCURY VAPOR DISCHARGE LAMP COMPRISING A VITREOUS ENVELOPE PROVIDING AN ELONGATED DISCHARGE CHANNEL WITH ELECTRODES SEALED INTO OPPOSITE ENDS AND AN IONIZABLE MEDIUM THEREIN INCLUDING MERCURY FOR PROVIDING IN OPERATION A MERCURY VAPOR PRESURE IN THE RANGE OF 2 TO 10 MICRONS FOR SUPPORTING AN ELECTRIC DISCHARGE WITH EFFICIENT GERNERATION OF 2537 A. RADIATION, AND A MERCURY FEEDBACK PASSAGE EXTENDING FROM A REGION OF DEPLETION OF MERCURY TO A REGION OF ACCUMULATION OF MERCURY WITHIN SAID LAMP, SAID PASSAGE BEING DIMENSIONED TO TRANMIT MERCURY VAPOR WHILE PREVENTING BYPASS OF THE ELECTRIC DISCHARGE THERETHROUGH.
Claim 2
Dependent Claim
96 words
A LOW PRESSURE MERCURY VAPOR DISCHARGE LAMP COMPRISING A VITREOUS ENVELOPE PROVIDING AN ELONGATED DISCHARGE CHANNEL WITH ELECTRODES SEALED INTO OPPOSITE ENDS AND AN IONIZABLE MEDIUM THEREIN INCLUDING MERCURY FOR PROVIDING IN OPERATION A MERCURY VAPOR PRESURE IN THE RANGE OF 2 TO 10 MICRONS FOR SUPPORTING AN ELECTRIC DISCHARGE WITH EFFICIENT GERNERATION OF 2537 A. RADIATION, AND A MERCURY FEEDBACK PASSAGE EXTENDING FROM A REGION OF DEPLETION OF MERCURY TO A REGION OF ACCUMULATION OF MERCURY WITHIN SAID LAMP, SAID PASSAGE BEING DIMENSIONED TO TRANMIT MERCURY VAPOR WHILE PREVENTING BYPASS OF THE ELECTRIC DISCHARGE THERETHROUGH.
References Cited (Backward Citations)
US1005866A
Cited
US2105463A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-01-06 | 1967-07-08 | 1968-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-01-06 | 1971-07-08 | 1972-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-01-06 | 1975-07-08 | 1976-01-07 | $7700.00 | Window Closed / Lapsed |