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US2964666A
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US
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Electroluminescent element
Assignee: US Philips Corp
•
Filing: 1957-09-19
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Granted: 1960-12-13
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Expires: 1977-09-19
Abstract
No abstract record available.
Inventors
- 👤 Klasens Hendrik Anne
- 👤 Joormann Hendrik Jacobus Maria
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:52
CPC Classifications
H; H05; H05B; H05B33/00; Y; Y10; Y10S; Y10S116/00; Y10S116/35
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2413940A
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US2494883A
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US2624857A
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US2774903A
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US2783407A
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US2692349A
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US2728870A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-13 | 1964-06-13 | 1964-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-13 | 1968-06-13 | 1968-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-13 | 1972-06-13 | 1972-12-13 | $7700.00 | Window Closed / Lapsed |