Patent US3219869A successfully refreshed from Google Patents.
US3219869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cesium vapor discharge lamp
Assignee: General Electric Co
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Filing: 1963-07-01
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Granted: 1965-11-23
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Expires: 1983-07-01
Abstract
No abstract record available.
Inventors
- 👤 Schmidt Kurt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:49
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/30; H01J61/302; H01J61/12; H01J61/18
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
109 words
A HIGH LUMINOUS EFFICIENCY CESIUM VAPOR LAMP COMPRISING A TUBULAR ELONGATED ENVELOPE OFMATERIAL RESISTANT TO THE ATTACK OF CESIUM VAPOR AT LEAST UP TO A TEMPERATURE OF APPROXIMATELY 900*C. AND HAVING AN INTERNAL DIAMETER IN THE RANGE OF 3 TO 15 MILLIMETERS, A PAIR OF ELECTRODES SEALED INTO OPPOSITE ENDS, AN IONIZABLE MEDIUM WITHIN SAID ENVELOPE COMPRISING AN INERT STARTING GAS, AN EXCESS OF CESIUM EMTAL, AND A LIMITED QUANTITY OF MERCURY, SAID LAMP OPERATING WITH A CURRENT DINSITY IN THE RANGE OF 20 TO 100 AMPERES PER SQUARE CENTIMETER OF DISCHARGE CROSS SECTION RESULTING IN PARTIAL VAPORIZATION OF SAID CESIUM AND COMPLETE VAPORIZATION OF SAID MERCURY AND WITH
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-22 | 1969-05-24 | 1969-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-22 | 1973-05-24 | 1973-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-22 | 1977-05-24 | 1977-11-23 | $7700.00 | Window Closed / Lapsed |