US4453107A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Long life tungsten halogen lamp with hydrogen bromide and methyl bromide
Assignee: Osram Sylvania Inc
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Filing: 1982-01-22
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Granted: 1984-06-05
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Expires: 2002-01-22
Abstract
Abstract Long life tungsten halogen lamps using bromine as the halogen are provided when the lamp contains the bromine as HBr and CH 3 Br in a ratio of 2.5 to 1 when used with argon as a carrier gas and 1.5 to 1 when krypton is used.
Inventors
- 👤 James P. Keenan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:23
CPC Classifications
H; H01; H01K; H01K1/00; H01K1/50; Y; Y02; Y02B; Y02B20/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
32 words
A sealed incandescent lamp containing a tungsten filament and a fill gas, said fill gas comprising hydrogen bromide and methyl bromide in a volume ratio of about 2.5 to 1, and argon.
Claim 2
Dependent Claim
32 words
A sealed incandescent lamp containing a tungsten filament and a fill gas, said fill gas comprising hydrogen bromide and methyl bromide in a volume ratio of about 2.5 to 1, and argon.
Claim 3
Dependent Claim
24 words
The lamp of claim 1 wherein said fill gas comprises, by volume, about 0.25% hydrogen bromide; about 0.1% methyl bromide; and the remainder argon.
Claim 4
Dependent Claim
23 words
The lamp of claim 1 or 2 wherein said fill gas has a cold lamp pressure of from about 2.0 to 4.0 atmospheres.
Claim 5
Dependent Claim
32 words
A sealed incandescent lamp containing a tungsten filament and a fill gas; said fill gas comprising hydrogen bromide and methyl bromide in a volume ratio of about 1.5 to 1, and krypton.
Claim 6
Dependent Claim
32 words
A sealed incandescent lamp containing a tungsten filament and a fill gas; said fill gas comprising hydrogen bromide and methyl bromide in a volume ratio of about 1.5 to 1, and krypton.
Claim 7
Dependent Claim
26 words
The lamp of claim 4 wherein said fill gas comprises, by volume, about 0.15% hydrogen bromide; about 0.1% methyl bromide; and the remainder is essentially krypton.
Claim 8
Dependent Claim
13 words
The lamp of claim 5 wherein said remainder includes less than 1% xenon.
Claim 9
Dependent Claim
24 words
The lamp of claim 4, 5 or 6 wherein said fill gas has a cold lamp pressure of from about 2.0 to 4.0 atmospheres.
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) | 1987-06-05 | 1987-12-05 | 1988-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-05 | 1991-12-05 | 1992-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-05 | 1995-12-05 | 1996-06-05 | $7700.00 | Window Closed / Lapsed |