Patent US3896326A successfully refreshed from Google Patents.
US3896326A
Expired / Lapsed
US
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Metal halide discharge lamp having expanded section arc tube
Assignee: GTE Sylvania Inc
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Filing: 1973-07-19
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Granted: 1975-07-22
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Expires: 1993-07-19
Abstract
Abstract The arc tube of a metal halide arc discharge lamp has electrodes at each end thereof and contains a fill including mercury and metal halide. The arc tube has an expanded diameter section intermediate the electrodes, instead of being of uniform diameter.
Inventors
- 👤 Timothy Fohl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:41
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/30; H01J61/33
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
57 words
A GENERAL ILLUMINAATION WALL STABILIZED METAL HALIDE ARC DISCHARGE LAMP COMPRISING: AN OUTER ENVELOPE, A GENERALLY TUBULAR ARC TUBE, HAVING ELECTRODES AT EACH END, DISPOSED WITHIN SAID ENVELOPE, SAID ARC TUBE CONTAINING A FILL INCLUDING MERCURY, METAL HALIDE AND AN INERT GAS, THE DIAMETER OF SAID ARC TUBE BEING AT A MINIMUM AT ABOUT THE ELECTRODE REGIONS
Claim 2
Dependent Claim
57 words
A GENERAL ILLUMINAATION WALL STABILIZED METAL HALIDE ARC DISCHARGE LAMP COMPRISING: AN OUTER ENVELOPE, A GENERALLY TUBULAR ARC TUBE, HAVING ELECTRODES AT EACH END, DISPOSED WITHIN SAID ENVELOPE, SAID ARC TUBE CONTAINING A FILL INCLUDING MERCURY, METAL HALIDE AND AN INERT GAS, THE DIAMETER OF SAID ARC TUBE BEING AT A MINIMUM AT ABOUT THE ELECTRODE REGIONS
Claim 3
Dependent Claim
84 words
A general illumination wall stabilized metal halide arc discharge lamp comprising: an outer envelope; a generally tubular arc tube, having electrodes at each end, disposed within said envelope, said arc tube containing a fill including mercury, metal halide and an inert gas, the diameter of said arc tube being at a minimum at about the electrode regions thereof and gradually increasing therefrom to a maximum diameter at a region near the center of said arc tube; and a means to energize said arc tube.
Claim 4
Dependent Claim
84 words
A general illumination wall stabilized metal halide arc discharge lamp comprising: an outer envelope; a generally tubular arc tube, having electrodes at each end, disposed within said envelope, said arc tube containing a fill including mercury, metal halide and an inert gas, the diameter of said arc tube being at a minimum at about the electrode regions thereof and gradually increasing therefrom to a maximum diameter at a region near the center of said arc tube; and a means to energize said arc tube.
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) | 1978-07-21 | 1979-01-20 | 1979-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-21 | 1983-01-20 | 1983-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-21 | 1987-01-20 | 1987-07-22 | $7700.00 | Window Closed / Lapsed |