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US3402609A
Expired / Lapsed
US
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Semiconductor mechanical-to-electrical transducer
Assignee: Toyota Central R&D Labs Inc
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Filing: 1965-09-16
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Granted: 1968-09-24
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Expires: 1985-09-16
Abstract
No abstract record available.
Inventors
- 👤 Takewo Chiku
- 👤 Isemi Igarashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:35
CPC Classifications
G; G01; G01L; G01L9/00; G01L9/0041; G01L9/008; G01L9/0051; G01L9/0052; G01L9/0055
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2643869A
Cited
US2882731A
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US3292128A
Cited
US3230763A
Cited
US3315301A
Cited
US3323358A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-24 | 1972-03-25 | 1972-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-24 | 1976-03-25 | 1976-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-24 | 1980-03-25 | 1980-09-24 | $7700.00 | Window Closed / Lapsed |