Patent US2518909A successfully refreshed from Google Patents.
US2518909A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Signal responsive to currentpassage time
Assignee: Individual
•
Filing: 1947-12-13
•
Granted: 1950-08-15
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Expires: 1967-12-13
Abstract
No abstract record available.
Inventors
- 👤 Edwin G Krakauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:51
CPC Classifications
H; H01; H01K; H01K1/00; H01K1/62; H01K1/64; G; G08; G08B; G08B5/00; G08B5/22; G08B5/36; G08B5/38; H05; H05B; H05B41/00; H05B41/14; H05B41/46
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US645588A
Cited
US1521176A
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US1456568A
Cited
US1830216A
Cited
US1896218A
Cited
GB375657A
Cited
US2049338A
Cited
US2435907A
Cited
US2457879A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-14 | 1954-02-13 | 1954-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-14 | 1958-02-13 | 1958-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-14 | 1962-02-13 | 1962-08-15 | $7700.00 | Window Closed / Lapsed |