US3595804A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for preparing zinc and zinccadmium sulfide phosphors
Assignee: RCA Licensing Corp
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Filing: 1968-10-30
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Granted: 1971-07-27
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Expires: 1988-10-30
Abstract
Abstract A METHOD FOR PREPARING ZINC AND ZINC-CAMIUM SULFIDE PHOSPHORS INCLUDING PLACING IN A COVERED CONTAINER A MIXTURE OF ZINC SULFIDE OR ZINC-CADMIUM SULFIDE, AN ACTIVATOR QUANTITY OF COPPER OR SILVER AS A COMPOUND THEREOF, AN ACTIVATOR QUANTITY OF ALUMINUM AS A COMPOUND THEREOF, A MINOR PROPORTION OF SULFUR AND A MINOR PROPORTION OF CARBON. THE MIXTURE IS HEATED TO ITS REACTION TEMPERATURE AND THEN COOLED. AFTER COOLING, WHATEVER CARBON REMAINS IS REMOVED AS BY SCREENING THE BATCH THROUGH A SCREEN.
Inventors
- 👤 Joseph S Martin Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:45
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/64; C09K11/641; C09K11/642
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) | 1974-07-26 | 1975-01-25 | 1975-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-26 | 1979-01-25 | 1979-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-26 | 1983-01-25 | 1983-07-27 | $7700.00 | Window Closed / Lapsed |