US2551585A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mechanical compensator for remote indicating impedance circuits
Assignee: Fischer and Porter Co
•
Filing: 1946-08-31
•
Granted: 1951-05-08
•
Expires: 1966-08-31
Abstract
No abstract record available.
Inventors
- 👤 Fred J Curran
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:26
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/05; G01F1/20; G01F1/22; G01F1/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR16861E
Cited
GB191423071A
Cited
US1336511A
Cited
US1391911A
Cited
US2072223A
Cited
US2414086A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-07 | 1954-11-06 | 1955-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-07 | 1958-11-06 | 1959-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-07 | 1962-11-06 | 1963-05-08 | $7700.00 | Window Closed / Lapsed |