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Patent US4074166A successfully refreshed from Google Patents.
US4074166A
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Ultraviolet emitting arc discharge lamp
Assignee: GTE Sylvania Inc
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Filing: 1976-11-19
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Granted: 1978-02-14
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Expires: 1996-11-19
Abstract
Abstract A highly loaded ultraviolet emitting arc discharge lamp has an arc length longer than 36 inches and contains a fill of mercury, inert gas at 8-10 torr and a small amount of niobium.
Inventors
- 👤 Edward A. Webb
- 👤 Nikolaos Barakitis
- 👤 Keith Pigott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:28
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/12; H01J61/18; H01J61/20
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
45 words
An ultraviolet-emitting highly loaded arc discharge lamp having an arc length greater than 36 inches containing an arc tube fill of mercury, inert gas and niobium, the inert gas pressure being between about 8-10 torr, the amount of niobium being adequate to stabilize the arc.
Claim 2
Dependent Claim
45 words
An ultraviolet-emitting highly loaded arc discharge lamp having an arc length greater than 36 inches containing an arc tube fill of mercury, inert gas and niobium, the inert gas pressure being between about 8-10 torr, the amount of niobium being adequate to stabilize the arc.
Claim 3
Dependent Claim
11 words
The lamp of claim 1 wherein the inert gas is argon.
Claim 4
Dependent Claim
12 words
The lamp of claim 2 wherein the argon pressure is 9 torr.
References Cited (Backward Citations)
US4000431A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-02-13 | 1981-08-15 | 1982-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-13 | 1985-08-15 | 1986-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-13 | 1989-08-15 | 1990-02-14 | $7700.00 | Window Closed / Lapsed |