US3693006A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lamp employing luminescent manganese-activated strontium barium chloro-aluminate phosphor compositions
Assignee: GTE Sylvania Inc
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Filing: 1971-06-22
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Granted: 1972-09-19
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Expires: 1991-06-22
Abstract
Abstract Cerium sensitized, manganese-activated strontium barium chloroaluminate phosphor compositions are disclosed wherein the formula for the phosphor can be characterized as follows:
Inventors
- 👤 Charles F Chenot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:33
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/77; C09K11/7715; C09K11/7721; H; H01; H01J; H01J61/00; H01J61/02; H01J61/38; H01J61/42; H01J61/44
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
17 words
A device according to claim 1, wherein said composition x is between about 0.21 to about 0.25.
Claim 2
Dependent Claim
13 words
A device according to claim 2, wherein said composition u is about 0.01.
Claim 3
Dependent Claim
14 words
A device according to claim 3, wherein in said composition w is about 0.01.
Claim 4
Dependent Claim
28 words
The device according to claim 4, wherein said internal surface of said envelope has an uncoated portion, thereby leaving a clear glass slit for light to emerge therethrough.
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) | 1975-09-19 | 1976-03-20 | 1976-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-19 | 1980-03-20 | 1980-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-19 | 1984-03-20 | 1984-09-19 | $7700.00 | Window Closed / Lapsed |