US2966464A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making silver activated sulphide phosphors
Assignee: GTE Sylvania Inc
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Filing: 1957-10-28
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Granted: 1960-12-27
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Expires: 1977-10-28
Abstract
No abstract record available.
Inventors
- 👤 Richard C Ropp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:52
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/58; C09K11/582; C09K11/584
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
73 words
IN THE METHOD OF MAKING A PHOSPHOR COMPRISING THE FIRED REACTION PRODUCT OF A SULPHIDE OF THE GROUP CONSISTING OF ZINC SULPHIDE, CADMIUM SULPHIDE AND ZINC-CADMIUM SULPHIDE AND A SMALL QUANTITY OF A SILVER SALT AS AN ACTIVATOR FOR SAID PHOSPHOR, THE STEPS OF WASHING THE PHOSPHOR WITH AN AQUEOUS SOLUTION OF A THIOSULPHATE PROMPTLY UPON COOLING THE PHOSPHOR AFTER THE FIRING OPERATION, AND THEREAFTER SUBJECTING SAID PHOSPHOR TO FURTHER WASHING WITH WATER.
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) | 1963-12-27 | 1964-06-27 | 1964-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-27 | 1968-06-27 | 1968-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-27 | 1972-06-27 | 1972-12-27 | $7700.00 | Window Closed / Lapsed |