US3539796A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroluminescent lighting units
Assignee: Elco Corp
•
Filing: 1968-01-11
•
Granted: 1970-11-10
•
Expires: 1988-01-11
Abstract
No abstract record available.
Inventors
- 👤 Edward Zychal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:35
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/12; H05B33/22; H05B33/24; Y; Y10; Y10S; Y10S385/00; Y10S385/901
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1158600A
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US1965865A
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US2314096A
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US2538475A
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US2705318A
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US2831453A
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US2975318A
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US3083317A
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US3046432A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-09 | 1974-05-11 | 1974-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-09 | 1978-05-11 | 1978-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-09 | 1982-05-11 | 1982-11-10 | $7700.00 | Window Closed / Lapsed |