US2463312A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency controlled ammeter
Assignee: —
•
Filing: —
•
Granted: 1949-03-01
•
Expires: 1966-03-01
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:42
CPC Classifications
G; G01; G01R; G01R21/00; G01R21/001; G01R21/003
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE191265C
Cited
US439381A
Cited
US952778A
Cited
DE320655C
Cited
US1995305A
Cited
DE622581C
Cited
US2050674A
Cited
US2306137A
Cited
US2265011A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-02-29 | 1952-08-30 | 1953-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-02-29 | 1956-08-30 | 1957-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-02-29 | 1960-08-30 | 1961-03-01 | $7700.00 | Window Closed / Lapsed |