US3595802A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Divalent europium activated bariumstrontium aluminate luminescent material
Assignee: US Philips Corp
•
Filing: 1968-12-09
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Granted: 1971-07-27
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Expires: 1988-12-09
Abstract
Abstract BIVALENT EUROPIUM ACTIVATED BARIUM OR BARIUM-STRONTIUM LUMINESCENT ALUMINATE USEFUL IN MERCURY VAPOR LAMPS.
Inventors
- 👤 George Blasse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:11
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/77; C09K11/7728; C09K11/7734; H; H01; H01J; H01J61/00; H01J61/02; H01J61/38; H01J61/42; H01J61/44
Claims Analysis
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-26 | 1975-01-25 | 1975-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-26 | 1979-01-25 | 1979-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-26 | 1983-01-25 | 1983-07-27 | $7700.00 | Window Closed / Lapsed |