US2736712A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Luminescent magnesium oxide
Assignee: General Electric Co
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Filing: 1954-08-10
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Granted: 1956-02-28
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Expires: 1974-08-10
Abstract
No abstract record available.
Inventors
- 👤 William A Runciman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:33
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/67; C09K11/68; C09K11/681
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
A LUMINESCENT MATERIAL CONSISTING ESSENTIALLY OF CRYSTALLINE MAGNESIUM OXIDE CONTAINING IN THE CRYSTAL STRUCTURE BOTH ACTIVATING CHROMIUM IN A RATIO OF FROM .01% TO 1% CHROMIUM ATOMS TO MAGNESIUM ATOMS AND AT LEAST ONE OF THE METALS LITHIUM, SODIUM, POTASSIUM AND THALLIUM IN THE MONOVALENT FROM AND IN A RATIO FROM 0.1% TO 10% OF ATOMS OF SAID METAL TO MAGNESIUM ATOMS.
Claim 2
Dependent Claim
62 words
A LUMINESCENT MATERIAL CONSISTING ESSENTIALLY OF CRYSTALLINE MAGNESIUM OXIDE CONTAINING IN THE CRYSTAL STRUCTURE BOTH ACTIVATING CHROMIUM IN A RATIO OF FROM .01% TO 1% CHROMIUM ATOMS TO MAGNESIUM ATOMS AND AT LEAST ONE OF THE METALS LITHIUM, SODIUM, POTASSIUM AND THALLIUM IN THE MONOVALENT FROM AND IN A RATIO FROM 0.1% TO 10% OF ATOMS OF SAID METAL TO MAGNESIUM ATOMS.
References Cited (Backward Citations)
GB548997A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-02-27 | 1959-08-29 | 1960-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-27 | 1963-08-29 | 1964-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-27 | 1967-08-29 | 1968-02-28 | $7700.00 | Window Closed / Lapsed |