US3761758A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal halide lamp containing mercury, light emitting metal, sodium and another alkali metal
Assignee: GTE Sylvania Inc
•
Filing: 1972-01-27
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Granted: 1973-09-25
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Expires: 1992-01-27
Abstract
Abstract In a metal halide arc discharge lamp having an arc tube fill including mercury, halogen, sodium and a light emitting metal, controlled amounts of cesium, potassium or rubidium are added to the arc tube fill.
Inventors
- 👤 F Koury
- 👤 W Bamberg
- 👤 W Gungle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:24
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/12; H01J61/125
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
17 words
The lamp of claim 1 wherein said light emitting metal is scandium, indium, thallium, gallium or dysprosium.
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) | 1976-09-24 | 1977-03-26 | 1977-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-24 | 1981-03-26 | 1981-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-24 | 1985-03-26 | 1985-09-25 | $7700.00 | Window Closed / Lapsed |