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Patent US2743237A successfully refreshed from Google Patents.
US2743237A
Expired / Lapsed
US
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Zinc sulphide phosphor containing aluminum
Assignee: General Electric Co
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Filing: 1952-08-29
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Granted: 1956-04-24
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Expires: 1972-08-29
Abstract
No abstract record available.
Inventors
- 👤 Herman C Froelich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:11
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/64; C09K11/641; C09K11/642
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
A COPPER-ACTIVATED ZINC SUPHIDE PHOSPHOR HAVING YELLOW AND ORANGE EMISSION AND CONTAINING ALUMINUM IN A MOLAR RATIO OF CU TO AL IN THE RANGE OF ABOUT 1:1 TO 1:30, THE COPPER CONTENT BEING IN THE RANGE OF ABOUT .05% TO 1% BY WEIGHT OF THE ZINC SULPHIDE.
Claim 2
Dependent Claim
47 words
A COPPER-ACTIVATED ZINC SUPHIDE PHOSPHOR HAVING YELLOW AND ORANGE EMISSION AND CONTAINING ALUMINUM IN A MOLAR RATIO OF CU TO AL IN THE RANGE OF ABOUT 1:1 TO 1:30, THE COPPER CONTENT BEING IN THE RANGE OF ABOUT .05% TO 1% BY WEIGHT OF THE ZINC SULPHIDE.
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) | 1959-04-24 | 1959-10-24 | 1960-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-24 | 1963-10-24 | 1964-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-24 | 1967-10-24 | 1968-04-24 | $7700.00 | Window Closed / Lapsed |