US4859906A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Deep UV lamp bulb with improved fill
Assignee: Fusion Systems Corp
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Filing: 1982-10-06
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Granted: 1989-08-22
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Expires: 2002-10-06
Abstract
Abstract An electrodeless lamp bulb comprises of a quartz envelope and a fill containing mercury in a ratio of from 0.5-0.9 microliters per milliliter of envelope volume at room temperature. A lamp including such bulb which is powered by microwaves.
Inventors
- 👤 Michael G. Ury
- 👤 Charles H. Wood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:02
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/70; G03F7/70008; G03F7/70016; H; H01; H01J; H01J65/00; H01J65/04; H01J65/042; H01J65/044
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
53 words
An electrodeless lamp bulb for producing a relatively high output in the deep UV part of the spectrum, comprising: a quartz envelope which does not contain electrodes therein, and a fill inside said envelope consisting essentially of mercury in a ratio of form 0.5-0.9 μl per ml of envelope volume at room temperature.
Claim 2
Dependent Claim
53 words
An electrodeless lamp bulb for producing a relatively high output in the deep UV part of the spectrum, comprising: a quartz envelope which does not contain electrodes therein, and a fill inside said envelope consisting essentially of mercury in a ratio of form 0.5-0.9 μl per ml of envelope volume at room temperature.
Claim 3
Dependent Claim
12 words
The lamp bulb of claim 1 wherein said fill also includes argon.
Claim 4
Dependent Claim
22 words
The lamp bulb of claim 2 wherein said envelope is spherical and has an inside diameter of 10 mm to 35 mm.
Claim 5
Dependent Claim
69 words
A relatively bright electrodeless lamp for producing a relatively high output in the deep UV part of the spectrum, comprising, means for generating microwave energy, a lamp bulb comprising a quartz envelope and a fill inside said envelope consisting essentially of mercury in a ratio of from 0.5-0.9 μl per ml of envelope volume at room temperature, and means for coupling said generated microwave energy to said lamp bulb.
Claim 6
Dependent Claim
69 words
A relatively bright electrodeless lamp for producing a relatively high output in the deep UV part of the spectrum, comprising, means for generating microwave energy, a lamp bulb comprising a quartz envelope and a fill inside said envelope consisting essentially of mercury in a ratio of from 0.5-0.9 μl per ml of envelope volume at room temperature, and means for coupling said generated microwave energy to said lamp bulb.
Claim 7
Dependent Claim
28 words
The electrodeless lamp of claim 4, wherein said means for coupling comprises, means for coupling said microwave energy to said bulb at a power density exceeding 250 watts/cc.
Claim 8
Dependent Claim
32 words
The electrodeless lamp of claim 5 wherein said means for coupling includes a microwave chamber in which said bulb is disposed, said chamber having a slot therein for admitting said microwave energy.
Claim 9
Dependent Claim
24 words
The lamp of claim 6 wherein said lamp envelope has a maximum dimension which is substantially smaller than a wavelength of said microwave energy.
Claim 10
Dependent Claim
53 words
The lamp of claim 7 wherein said microwave chamber has an opening for allowing deep UV radiation to escape, which is covered by a mesh which is substantially transparent to deep UV radiation but substantially opaque to microwave energy, and wherein said microwave chamber without said envelope in it is a near-resonant cavity.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-08-21 | 1993-02-20 | 1993-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-08-21 | 1997-02-20 | 1997-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-08-21 | 2001-02-20 | 2001-08-22 | $7700.00 | Window Closed / Lapsed |