US3614508A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal halide discharge lamp containing beryllium
Assignee: New Nippon Electric Co Ltd
•
Filing: 1969-10-27
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Granted: 1971-10-19
•
Expires: 1989-10-27
Abstract
Abstract A high-pressure electric discharge lamp which emits a continuous spectrum and containing beryllium, halogen and mercury. The lamp is operated at temperatures in the range of 300* to 700* C. to obtain white light emission of good color-rendering properties and brightness.
Inventors
- 👤 Saburo Ito
- 👤 Shingo Ezaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:08
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/12; H01J61/18; H01J61/22
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
32 words
The metal vapor discharge lamp according to claim 1 wherein said beryllium is present in quantities of 5.5 X 10 to 2.2 X 10 gram atoms per cm. of arc tube volume.
Claim 2
Dependent Claim
26 words
The metal vapor discharge lamp according to claim 2 wherein the atomic ratio of said halogen and said beryllium is respectively between about 0.2:1 and 4.0:1.
Claim 3
Dependent Claim
13 words
The metal vapor discharge lamp according to claim 1 wherein halogen is iodine.
References Cited (Backward Citations)
US3234421A
Cited
US3259777A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-18 | 1975-04-19 | 1975-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-18 | 1979-04-19 | 1979-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-18 | 1983-04-19 | 1983-10-19 | $7700.00 | Window Closed / Lapsed |