US2563900A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phosphor and method of making
Assignee: Westinghouse Electric Corp
•
Filing: 1947-06-21
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Granted: 1951-08-14
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Expires: 1967-06-21
Abstract
No abstract record available.
Inventors
- 👤 Robert W Wollentin
- 👤 Nagy Rudolph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:25
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/70; C09K11/71
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
A PHOSPHOR HAVING A HIGH OUTPUT IN THE ERYTHEMAL REGION AND ONLY A VERY SMALL OUTPUT OF VISIBLE RADIATIONS, CONSISTING ESSENTIALLY OF A THALLIUM-ACTIVATED PHOSPHATE OF CALCIUM WITH FROM 4% TO 12% OF ZINC PHOSPHATE IN SOLID SOLUTION, AND HAVING ITS PEAK OF EMISSION AT BETWEEN ABOUT 3040 AND 3155 A.U.
Claim 2
Dependent Claim
51 words
A PHOSPHOR HAVING A HIGH OUTPUT IN THE ERYTHEMAL REGION AND ONLY A VERY SMALL OUTPUT OF VISIBLE RADIATIONS, CONSISTING ESSENTIALLY OF A THALLIUM-ACTIVATED PHOSPHATE OF CALCIUM WITH FROM 4% TO 12% OF ZINC PHOSPHATE IN SOLID SOLUTION, AND HAVING ITS PEAK OF EMISSION AT BETWEEN ABOUT 3040 AND 3155 A.U.
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) | 1954-08-13 | 1955-02-12 | 1955-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-13 | 1959-02-12 | 1959-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-13 | 1963-02-12 | 1963-08-14 | $7700.00 | Window Closed / Lapsed |