US3583928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-speed phosphors and methods to prepare same
Assignee: Westinghouse Electric Corp
•
Filing: 1970-03-25
•
Granted: 1971-06-08
•
Expires: 1990-03-25
Abstract
Abstract HIGH-SPEED PHOSPHOR IS ZINC OXIDE OR ZINC-CADMIUM OXIDE DOPED WITH ALUMINUM, GALLIUM, OR INDIUM. EACH ATOM OF DOPANT CONTRIBUTES APPROXIMATELY ONE FREE ELECTRON TO THE CONDUCTIVITY OF THE PHOSPHOR AND DUE TO THE ELIMINATION OF TRAPS, THE PHOSPHOR HAS VERY RAPID DECAY CHARACTERISTICS WHICH AARE ESTIMATED TO BE IN THE ORDER OF 10**-10 SECOND. IN THE PREFERRED MODE OF PREPARATION, THE PHOSPHOR IS FIRED IN HYDROGEN TO CAUSE THE FIRED MATERIAL, WHEN COOLED, TO DISPLAY SUBSTANTIALLY A MAXIMUM POSSIBLE VALUE OF ELECTRICAL CONDUCTIVITY. AMONG THE SPECIAL APPLICATIONS FOR SUCH PHOSPHOR ARE CATHODE-RAY DEVICES.
Inventors
- 👤 Willi Lehmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:22
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/0805; C09K11/0811; G; G01; G01T; G01T1/00; G01T1/16; G01T1/20; G01T1/202; H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/18; H01J29/20
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |