US4134851A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aluminophosphate luminescent glass
Assignee: Osram Sylvania Inc
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Filing: 1977-09-16
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Granted: 1979-01-16
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Expires: 1997-09-16
Abstract
Abstract A luminescent glass comprising a host material consisting essentially of 25 to 36 mole percent Al2O3, the balance P2O5, and which is doped with cerium and terbium. The glass is an efficient emitter of visible radiation, predominantly green, when excited by ultraviolet radiation.
Inventors
- 👤 Richard M. Klein
- 👤 William F. Nelson
- 👤 Romano G. Pappalardo
- 👤 Leslie A. Riseberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:43
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/12; C03C3/16; C03C3/17; C03C4/00; C03C4/12
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
95 words
A luminescent glass comprising a host material and a dopant material, wherein the host material consists essentially of between 25 mole percent and 36 mole percent Al 2 O 3 with the balance P 2 O 5 , and the dopant material consists essentially of between 0.5 and 1 cation percent Ce 3+ and between 6 and 9 cation percent Tb 3+ , said percentages of Ce 3+ and Tb 3+ based on the total cation content of the luminescent glass, whereby the luminescent glass emits visible radiation, predominantly green, when excited by ultraviolet light.
Claim 2
Dependent Claim
95 words
A luminescent glass comprising a host material and a dopant material, wherein the host material consists essentially of between 25 mole percent and 36 mole percent Al 2 O 3 with the balance P 2 O 5 , and the dopant material consists essentially of between 0.5 and 1 cation percent Ce 3+ and between 6 and 9 cation percent Tb 3+ , said percentages of Ce 3+ and Tb 3+ based on the total cation content of the luminescent glass, whereby the luminescent glass emits visible radiation, predominantly green, when excited by ultraviolet light.
Claim 3
Dependent Claim
37 words
The glass of claim 1 wherein said dopant material consists essentially of Ce 3+ and Tb 3+ in amounts providing about 0.5 percent and about 6 percent, respectively, of the total cation content of said luminescent glass.
References Cited (Backward Citations)
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US2413940A
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US3525698A
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US3746556A
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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) | 1982-01-15 | 1982-07-17 | 1983-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-15 | 1986-07-17 | 1987-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-15 | 1990-07-17 | 1991-01-16 | $7700.00 | Window Closed / Lapsed |