US3635833A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manganese activated magnesium-lithium alumino-gallate luminescent material
Assignee: General Electric Co
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Filing: 1969-04-28
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Granted: 1972-01-18
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Expires: 1989-04-28
Abstract
Abstract Manganese-activated lithium gallate, magnesium-lithium gallate, and magnesium-lithium alumino-gallate phosphors emit in the green region when excited by cathode rays and short-wavelength ultraviolet radiation.
Inventors
- 👤 Ranajit Kumar Datta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:55
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/64; C09K11/646; C09K11/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
32 words
A luminescent material consisting essentially of a crystalline compound of lithium gallate containing magnesium, and having manganese incorporated integrally into the matrix having the following composition: Mg0.89Li0.005Ga1.805Al0.2O4: 0.01Mn wherein Mn is divalent.
Claim 2
Dependent Claim
27 words
A luminescent material consisting essentially of a crystalline compound of lithium gallate containing magnesium, and having manganese incorporated integrally into the matrix having the following composition: Mg0.89Li0.005Ga2.005O4:0.01Mn
References Cited (Backward Citations)
US3407325A
Cited
US3499843A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-17 | 1975-07-19 | 1976-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-17 | 1979-07-19 | 1980-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-17 | 1983-07-19 | 1984-01-18 | $7700.00 | Window Closed / Lapsed |