US4427924A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Enhanced electrodeless light source
Assignee: Osram Sylvania Inc
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Filing: 1981-10-01
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Granted: 1984-01-24
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Expires: 2001-10-01
Abstract
Abstract A source of visible light including an electrodeless lamp containing a mercury halide, iodine, and nitrogen. When the contents of the electrodeless lamp are excited by high frequency power, visible light is emitted.
Inventors
- 👤 Joseph M. Proud
- 👤 Walter P. Lapatovich
- 👤 Stephen G. Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:55
CPC Classifications
H; H01; H01J; H01J65/00; H01J65/04; H01J65/042; H01J65/046
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
62 words
An electromagnetic discharge apparatus comprising an electrodeless lamp having an envelope made of a light transmitting material; a fill material within said envelope consisting essentially of a mixture of a mercury halide, iodine, and nitrogen; and means for coupling high frequency power to the fill material within the envelope to vaporize and excite the fill material whereby the fill material emits light.
Claim 2
Dependent Claim
62 words
An electromagnetic discharge apparatus comprising an electrodeless lamp having an envelope made of a light transmitting material; a fill material within said envelope consisting essentially of a mixture of a mercury halide, iodine, and nitrogen; and means for coupling high frequency power to the fill material within the envelope to vaporize and excite the fill material whereby the fill material emits light.
Claim 3
Dependent Claim
25 words
An electromagnetic discharge apparatus in accordance with claim 1 wherein said mercury halide is selected from the group consisting of mercuric chloride and mercuric bromide.
Claim 4
Dependent Claim
43 words
An electromagnetic discharge apparatus in accordance with claim 1 wherein said fill material contains a mercury halide, iodine, and nitrogen in the ratio of 1 to 10 milligrams of mercury halide, 0.1 to 0.2 milligrams of iodine, and 1 to 10 torr nitrogen.
Claim 5
Dependent Claim
78 words
An electromagnetic discharge apparatus comprising an electrodeless lamp having an envelope made of a light transmitting material enclosing a fill material; and means for coupling high frequency power to the fill material within the envelope; the fill material consisting essentially of a mercury halide, nitrogen, and a source of iodine atoms which are excited to a high energy state when high frequency power is applied; whereby the fill material emits light when high frequency power is applied thereto.
Claim 6
Dependent Claim
78 words
An electromagnetic discharge apparatus comprising an electrodeless lamp having an envelope made of a light transmitting material enclosing a fill material; and means for coupling high frequency power to the fill material within the envelope; the fill material consisting essentially of a mercury halide, nitrogen, and a source of iodine atoms which are excited to a high energy state when high frequency power is applied; whereby the fill material emits light when high frequency power is applied thereto.
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) | 1987-01-23 | 1987-07-25 | 1988-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-23 | 1991-07-25 | 1992-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-23 | 1995-07-25 | 1996-01-24 | $7700.00 | Window Closed / Lapsed |