Patent US4293855A successfully refreshed from Google Patents.
US4874984A
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Fluorescent lamp based on a phosphor excited by a molecular discharge
Assignee: Osram Sylvania Inc
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Filing: 1988-04-11
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Granted: 1989-10-17
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Expires: 2008-04-11
Abstract
Abstract A fluorescent lamp based on a phosphor excited by a molecular discharge is described. The fluorescent lamp comprises a fluorescent lamp coated with a manganese doped magnesium aluminate phosphor on the inside surface of the lamp envelope. The fluorescent lamp contains corrosion resistant filamentary electron emitting electrodes. The fluorescent lamp produces a plasma which emits 206 nm radiation from the molecular discharge of the iodine containing molecular vapors and inert gas fill which in turn excites the phosphor to emit visible light.
Inventors
- 👤 A. Gary Sigai
- 👤 Walter P. Lapatovich
- 👤 Michael N. Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:16
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/64; C09K11/641; C09K11/643; H; H01; H01J; H01J61/00; H01J61/02; H01J61/38; H01J61/42; H01J61/44
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
100 words
A green emitting fluorescent lamp comprising a glass envelope having an inner wall, said inner wall of said glass envelope being coated with a manganese doped magnesium aluminate phosphor which emits visible light upon absorption of ultraviolet radiation of about 206 nm, said fluorescent lamp having corrosion resistant filamentary electron emitting electrodes, and said glass envelope enclosing a fill material which forms a plasma emitting ultraviolet radiation of about 206 nm during electrical discharge, said fill material comprises an iodine containing molecular vapor and an inert gas selected from the group consisting of neon, argon, krypton, xenon, and mixtures thereof.
Claim 2
Dependent Claim
100 words
A green emitting fluorescent lamp comprising a glass envelope having an inner wall, said inner wall of said glass envelope being coated with a manganese doped magnesium aluminate phosphor which emits visible light upon absorption of ultraviolet radiation of about 206 nm, said fluorescent lamp having corrosion resistant filamentary electron emitting electrodes, and said glass envelope enclosing a fill material which forms a plasma emitting ultraviolet radiation of about 206 nm during electrical discharge, said fill material comprises an iodine containing molecular vapor and an inert gas selected from the group consisting of neon, argon, krypton, xenon, and mixtures thereof.
Claim 3
Dependent Claim
22 words
A fluorescent lamp in accordance with claim 1 wherein said manganese doped magnesium aluminate phosphor has an approximate formula MgAl.sub.2 O.sub.4 :Mn
Claim 4
Dependent Claim
19 words
A fluorescent light source in accordance with claim 2 wherein said approximate formula is (Mg.sub.1-x Mn.sub.x)Al.sub.2 O.sub.4 wherein 0.005≦x≦0.05.
Claim 5
Dependent Claim
31 words
A fluorescent lamp in accordance with claim 1 wherein said iodine containing molecular vapor selected from the consisting of molecular vapors of I 2 , HgI 2 , and mixtures thereof.
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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) | 1992-10-16 | 1993-04-17 | 1993-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-16 | 1997-04-17 | 1997-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-16 | 2001-04-17 | 2001-10-17 | $7700.00 | Window Closed / Lapsed |