Patent US3623907A successfully refreshed from Google Patents.
US3623907A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Doped strontium halide phosphor and device for infrared to visible light conversion
Assignee: Texas Instruments Inc
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Filing: 1969-09-19
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Granted: 1971-11-30
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Expires: 1989-09-19
Abstract
Abstract STRONTIUM CHLORIDE (SRCL2) IS DOPED WITH APPROXIMATELY 20% YTTERBIUM (YB) AND APPROXIMATELY 1% OF EITHER ERBIUM (ER) OR HOLMIUM (HO) AND APPLIED TO THE SURFACE OF A GALLIUM ARSENIDE:SILICONDOPED DIODE. WHEN THE DIODE IS ENERGIZED, THE INFRARED EENERGY WHICH IS EMITTED IS CONVERTED TO VISIBLE LIGHT BY THE DOPED STRONTIUM CHLORIDE PHOSPHOR.
Inventors
- 👤 Roderick K Watts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:31
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/77; C09K11/7766; C09K11/7772; C09K11/7773; G; G02; G02F; G02F2/00; G02F2/02
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) | 1974-11-29 | 1975-05-31 | 1975-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-29 | 1979-05-31 | 1979-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-29 | 1983-05-31 | 1983-11-30 | $7700.00 | Window Closed / Lapsed |