US3668455A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical translating device containing spheroidal phosphors
Assignee: GTE Sylvania Inc
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Filing: 1968-07-01
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Granted: 1972-06-06
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Expires: 1988-07-01
Abstract
Abstract A fluorescent lamp with an inorganic phosphor coating on the lamp envelope. The phosphor particles have the shape of foraminous spheres with a diameter between about 3 and 20 Mu . In the preferred embodiment, these spheres are hollow so that there is a maximum of emitting surface for a minimum weight of powder.
Inventors
- 👤 Ernest A Dale
- 👤 Martha J B Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:10
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/18; H01J29/20; H01J61/00; H01J61/02; H01J61/38; H01J61/42; H01J61/44
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
21 words
The lamp according to claim 1 wherein said spheroidal phosphor bodies have a diameter between about 3 and 20 Mu .
Claim 2
Dependent Claim
29 words
The lamp according to claim 1 wherein a substantial proportion of said spheroidal phosphor bodies are hollow and have a wall thickness between about 0.5 and 8 Mu .
Claim 3
Dependent Claim
21 words
The lamp according to claim 3 wherein said spheroidal phosphor bodies have a diameter between about 3 and 20 Mu .
Claim 4
Dependent Claim
71 words
A high pressure electric discharge device comprising: a bulbous jacket with an arc tube disposed therein; means to produce exciting radiation within said arc tube; a phosphor coating disposed on the inner surface of said jacket and arranged so as to be irradiated by said exciting radiation, said phosphor coating comprised of at least one phosphor which has a substantial proportion of its particles in the form of spheroidal phosphor bodies.
Claim 5
Dependent Claim
21 words
The lamp according to claim 5 wherein said spheroidal phosphor bodies have a diameter between about 3 and 20 Mu .
Claim 6
Dependent Claim
28 words
The lamp according to claim 5 wherein a substantial proportion of said spheroidal bodies are hollow and have a wall thickness between about 0.5 and 8 Mu .
Claim 7
Dependent Claim
21 words
The lamp according to claim 7 wherein said spheroidal phosphor bodies have a diameter between about 3 and 20 Mu .
Claim 8
Dependent Claim
62 words
A cathode ray tube having, at one end, at least one electron gun from which electrons are beamed and, at the other end, a face panel; a coating of cathodoluminescent phosphor disposed upon said face panel and operatively associated with the beam from said gun; said phosphor coating having a substantial porportion of its particles in the form of spheroidal phosphor bodies.
Claim 9
Dependent Claim
21 words
The tube according to claim 9 wherein said spheroidal phosphor bodies have a diameter between about 3 and 20 Mu .
Claim 10
Dependent Claim
28 words
The tube according to claim 9 wherein a substantial proportion of said spheroidal bodies are hollow and have a wall thickness between about 0.5 and 8 Mu .
Claim 11
Dependent Claim
21 words
The tube according to claim 11 wherein said spheroidal phosphor bodies have a diameter between about 3 and 20 Mu .
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) | 1975-06-06 | 1975-12-06 | 1976-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-06 | 1979-12-06 | 1980-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-06 | 1983-12-06 | 1984-06-06 | $7700.00 | Window Closed / Lapsed |