US2749482A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric impulse lamp as transmitter for light-flash signaling system
Assignee: Individual
•
Filing: 1952-12-12
•
Granted: 1956-06-05
•
Expires: 1972-12-12
Abstract
No abstract record available.
Inventors
- 👤 Fruengel Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:17
CPC Classifications
F; F21; F21S; F21S41/00; F21S41/10; F21S41/14; F21S41/162; F21S41/164; F21S41/18; F21S41/30; F21S41/32; F21S41/321; F21S43/00; F21S43/10; F21S43/13; F21S43/30; F21S43/31
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1576236A
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US1799993A
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US1979692A
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US1950445A
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US2265068A
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US2484837A
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US2392828A
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US2476773A
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US2491342A
Cited
US2520565A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-05 | 1959-12-05 | 1960-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-05 | 1963-12-05 | 1964-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-05 | 1967-12-05 | 1968-06-05 | $7700.00 | Window Closed / Lapsed |