US3576757A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel fluorescent phosphor compositions
Assignee: GTE Sylvania Inc
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Filing: 1968-06-14
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Granted: 1971-04-27
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Expires: 1988-06-14
Abstract
Abstract PHOSPHORS CORRESPONDING TO THE FORMULA: AGA5O8:MN2+ WHERE A IS POTASSIUM, SODIUM, AND/OR LITHIUM AND WHEREIN ALUMINUM, SILICON AND/OR GERMANIUM MAY REPLACE GALLIUM IN AN AMOUNT NOT EXCEEDNG 70% THEREOF AND WHEREIN THE TOTAL CATION TO ANION RATION IS ABOUT 3 TO 4. THE PHOSPHORS RESPOND TO ULTRAVIOLET RADIATION AND CATHODE RAYS AND ARE USEFUL IN MERCURY VAPOR LAMPS AND CATHODE RAY TUBES.
Inventors
- 👤 Jesse J Brown Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:39
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/62
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) | 1974-04-26 | 1974-10-26 | 1975-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-26 | 1978-10-26 | 1979-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-26 | 1982-10-26 | 1983-04-27 | $7700.00 | Window Closed / Lapsed |