US2950447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromechanical transducer apparatus and systems embodying the same
Assignee: Individual
•
Filing: 1957-03-01
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Granted: 1960-08-23
•
Expires: 1977-03-01
Abstract
No abstract record available.
Inventors
- 👤 Clarence H Mcshan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:43
CPC Classifications
G; G04; G04C; G04C3/00; G04C3/08; G04C3/10; G04C3/04; G04C3/06; G04C3/065; H; H01; H01H; H01H51/00; H01H51/30; H01H51/32; H03; H03F; H03F1/00; H03F1/34; H03F1/36; H04; H04R; H04R11/00; H04R11/08; H04R11/12; H04R3/00; H04R3/002
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) | 1963-08-23 | 1964-02-22 | 1964-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-23 | 1968-02-22 | 1968-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-23 | 1972-02-22 | 1972-08-23 | $7700.00 | Window Closed / Lapsed |