US3049497A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thorium phosphate matrix luminescent materials
Assignee: EMI Group Ltd
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Filing: 1957-02-25
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Granted: 1962-08-14
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Expires: 1977-02-25
Abstract
No abstract record available.
Inventors
- 👤 Ranby Peter Whitten
- 👤 Hobbs Doreen Yvonne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:11
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/77; C09K11/7715; C09K11/7723
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
AN ARTIFICIAL LUMINESCENT MATERIAL CHARACTERIZED IN THAT IT CONSISTS ESSENTIALLY OF A THORIUM PHOSPHATE MATRIX ACTIVATED BY AT LEAST ONE ACTIVATOR BY WEIGHT OF THE MATRIX SELECTED FROM THE GROUP CONSISTING OF 0.005 TO 25% COPPER, 0.1 TO 20% CERIUM, 0.1 TO 20% ANTIMONY, 4 TO 16% LEAD.
Claim 2
Dependent Claim
48 words
AN ARTIFICIAL LUMINESCENT MATERIAL CHARACTERIZED IN THAT IT CONSISTS ESSENTIALLY OF A THORIUM PHOSPHATE MATRIX ACTIVATED BY AT LEAST ONE ACTIVATOR BY WEIGHT OF THE MATRIX SELECTED FROM THE GROUP CONSISTING OF 0.005 TO 25% COPPER, 0.1 TO 20% CERIUM, 0.1 TO 20% ANTIMONY, 4 TO 16% LEAD.
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) | 1965-08-13 | 1966-02-12 | 1966-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-13 | 1970-02-12 | 1970-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-13 | 1974-02-12 | 1974-08-14 | $7700.00 | Window Closed / Lapsed |