Patent US2661622A successfully refreshed from Google Patents.
US2661622A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric vibration pick-up
Assignee: Hartford National Bank and Trust Co
•
Filing: 1947-07-22
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Granted: 1953-12-08
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Expires: 1967-07-22
Abstract
No abstract record available.
Inventors
- 👤 Severs Jan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:19
CPC Classifications
G; G01; G01H; G01H1/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1930905A
Cited
US2137852A
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US1902184A
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US1882396A
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US2059107A
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US2289183A
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US2320390A
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US2375004A
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US2505601A
Cited
US2539418A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-07 | 1957-06-08 | 1957-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-07 | 1961-06-08 | 1961-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-07 | 1965-06-08 | 1965-12-08 | $7700.00 | Window Closed / Lapsed |