Patent US3491324A successfully refreshed from Google Patents.
US3491324A
Expired / Lapsed
US
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Electromechanical transducer
Assignee: Individual
•
Filing: 1968-03-20
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Granted: 1970-01-20
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Expires: 1988-03-20
Abstract
No abstract record available.
Inventors
- 👤 Pierre Huet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:36
CPC Classifications
G; G01; G01L; G01L9/00; G01L9/0026; G01L9/0027; G01L1/00; G01L1/20; G01L1/22; G01L1/2206; G01L9/0033; G01L9/0035; G01L9/0041; G01L9/0051; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082; Y10T29/49099
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) | 1973-01-19 | 1973-07-21 | 1974-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-19 | 1977-07-21 | 1978-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-19 | 1981-07-21 | 1982-01-20 | $7700.00 | Window Closed / Lapsed |