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US3758413A
Expired / Lapsed
US
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Terbium activated yttrium silicate phosphors
Assignee: Verizon Laboratories Inc
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Filing: 1970-02-04
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Granted: 1973-09-11
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Expires: 1990-02-04
Abstract
Abstract TERBIUM ACTIVATED YTTRIUM SILICATE PHOSPHORS WHICH EMIT GREEN LIGHT WHEN EXCITED BY ULTRAVOILET, CATHODE RAY OR X-RAY RADIATION. THE PHOSPHORS MAY BE USED IN FLUORESCENT LAMPS AND IN CATHODOLUMINESCENT SCREENS FOR CATHODERAY TUBES.
Inventors
- 👤 T Peters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:24
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/77; C09K11/7766; C09K11/77742
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |