US2564416A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mechanoelectric transducer
Assignee: Individual
•
Filing: 1949-03-14
•
Granted: 1951-08-14
•
Expires: 1969-03-14
Abstract
No abstract record available.
Inventors
- 👤 William A Wildhack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:26
CPC Classifications
H; H04; H04R; H04R21/00; H04R21/02; G; G01; G01G; G01G23/00; G01G23/18; G01G23/36; G01G3/00; G01G3/02; G01L; G01L1/00; G01L1/20; G01L9/00; G01L9/0041; G01P; G01P15/00; G01P15/02; G01P15/08
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) | 1954-08-13 | 1955-02-12 | 1955-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-13 | 1959-02-12 | 1959-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-13 | 1963-02-12 | 1963-08-14 | $7700.00 | Window Closed / Lapsed |