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US2754435A
Expired / Lapsed
US
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Voltage generating vibratory pick-up devices
Assignee: International Research and Development Co Ltd
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Filing: 1952-09-29
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Granted: 1956-07-10
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Expires: 1972-09-29
Abstract
No abstract record available.
Inventors
- 👤 Ongaro Theodore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:33
CPC Classifications
F; F04; F04B; F04B35/00; F04B35/04; G; G01; G01H; G01H1/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-10 | 1960-01-09 | 1960-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-10 | 1964-01-09 | 1964-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-10 | 1968-01-09 | 1968-07-10 | $7700.00 | Window Closed / Lapsed |