Patent US4379252A successfully refreshed from Google Patents.
US4379252A
Expired / Lapsed
US
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Arc discharge device containing HG196
Assignee: Osram Sylvania Inc
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Filing: 1978-09-05
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Granted: 1983-04-05
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Expires: 1998-09-05
Abstract
Abstract In a mercury-containing arc discharge device for converting electrical energy into resonance radiation, the isotopic distribution of the mercury in the device is altered from that of natural mercury so as to reduce imprisonment time of resonance radiation and thereby increase the efficiency of conversion of electrical energy into resonance radiation.
Inventors
- 👤 Dale E. Work
- 👤 Stephen G. Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:30
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/70; H01J61/72
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
44 words
A mercury-containing arc discharge device for converting electrical energy into resonance radiation, the Hg 196 content of the mercury within the device being greater than that in natural mercury in order to increase the efficiency of converting said electrical energy into said resonance radiation.
Claim 2
Dependent Claim
44 words
A mercury-containing arc discharge device for converting electrical energy into resonance radiation, the Hg 196 content of the mercury within the device being greater than that in natural mercury in order to increase the efficiency of converting said electrical energy into said resonance radiation.
Claim 3
Dependent Claim
14 words
The device in claim 1 wherein said Hg 196 content is greater than 0.146%.
Claim 4
Dependent Claim
45 words
A mercury-containing arc discharge device for converting electrical energy into resonance radiation, the isotopic distribution of the mercury being altered from that of natural mercury so as to reduce imprisonment time of resonance radiation, thereby increasing the efficiency of converting electrical energy into resonance radiation.
Claim 5
Dependent Claim
45 words
A mercury-containing arc discharge device for converting electrical energy into resonance radiation, the isotopic distribution of the mercury being altered from that of natural mercury so as to reduce imprisonment time of resonance radiation, thereby increasing the efficiency of converting electrical energy into resonance radiation.
Claim 6
Dependent Claim
54 words
In a fluorescent lamp of the type comprising an envelope having an electrode at each end, a phosphor coating on the envelope, and containing a fill including mercury and an inert gas, the improvement comprising the isotopic distribution of the mercury being altered from that of naturally-occurring mercury so as to improve lamp efficiency.
Claim 7
Dependent Claim
54 words
In a fluorescent lamp of the type comprising an envelope having an electrode at each end, a phosphor coating on the envelope, and containing a fill including mercury and an inert gas, the improvement comprising the isotopic distribution of the mercury being altered from that of naturally-occurring mercury so as to improve lamp efficiency.
Claim 8
Dependent Claim
25 words
The lamp of claim 4 wherein said isotopic distribution of mercury contains a higher proportion of Hg 196 isotope than is present in naturally-occurring mercury.
Claim 9
Dependent Claim
17 words
The lamp of claim 5 wherein the Hg 196 content of said mercury is greater than 0.146%.
Claim 10
Dependent Claim
18 words
The lamp of claim 5 wherein the Hg 196 content of said mercury is at least about 1%.
References Cited (Backward Citations)
JPS508594A
Cited
US3993379A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-04-04 | 1986-10-04 | 1987-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-04-04 | 1990-10-04 | 1991-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-04-04 | 1994-10-04 | 1995-04-05 | $7700.00 | Window Closed / Lapsed |