US4056751A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal halide discharge lamp having optimum electrode location
Assignee: GTE Sylvania Inc
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Filing: 1976-03-22
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Granted: 1977-11-01
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Expires: 1996-03-22
Abstract
Abstract In a metal halide arc discharge lamp having an arched arc tube with an electrode at each end thereof, each electrode is located about midway between the arc tube lower wall and the axis of the arc tube.
Inventors
- 👤 W. Calvin Gungle
- 👤 Federic Koury
- 👤 William M. Keeffe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:12
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/30; H01J61/32; H01J61/04; H01J61/06; H01J61/073
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
In a metal halide arc discharge lamp having an arched arc tube containing a fill of mercury, metal halide and inert gas and having electrodes sealed in each end of the arc tube and wherein the arc tube is normally operated in a horizontal position with the arch uppermost, the improvement which comprises the electrodes being located about midway between the arc tube axis and the lower wall of the arc tube.
Claim 2
Dependent Claim
72 words
In a metal halide arc discharge lamp having an arched arc tube containing a fill of mercury, metal halide and inert gas and having electrodes sealed in each end of the arc tube and wherein the arc tube is normally operated in a horizontal position with the arch uppermost, the improvement which comprises the electrodes being located about midway between the arc tube axis and the lower wall of the 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) | 1980-10-31 | 1981-05-02 | 1981-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-31 | 1985-05-02 | 1985-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-31 | 1989-05-02 | 1989-11-01 | $7700.00 | Window Closed / Lapsed |