US3404339A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Measurement of rotational speed of induction motors
Assignee: United States Department of the Navy
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Filing: 1965-09-16
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Granted: 1968-10-01
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Expires: 1985-09-16
Abstract
No abstract record available.
Inventors
- 👤 Dana D Mitchell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:05
CPC Classifications
G; G01; G01R; G01R31/00; G01R31/34; G01R31/343; G01P; G01P3/00; G01P3/42; G01P3/44; G01P3/48; G01P3/481; G01P3/487; G01R23/00; G01R23/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
SU154105A1
Cited
US3077760A
Cited
DE1178513B
Cited
US3188620A
Cited
US3218872A
Cited
US3321705A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-01 | 1972-04-01 | 1972-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-01 | 1976-04-01 | 1976-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-01 | 1980-04-01 | 1980-10-01 | $7700.00 | Window Closed / Lapsed |