US2835761A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostrictive ceramic actuator
Assignee: Electric Machinery Manufacturing Co
•
Filing: 1955-04-01
•
Granted: 1958-05-20
•
Expires: 1975-04-01
Abstract
No abstract record available.
Inventors
- 👤 Joseph W Crownover
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:36
CPC Classifications
H; H01; H01H; H01H57/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2640889A
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US2706326A
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US2714642A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-19 | 1961-11-18 | 1962-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-19 | 1965-11-18 | 1966-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-19 | 1969-11-18 | 1970-05-20 | $7700.00 | Window Closed / Lapsed |