US2954522A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transient frequency meter
Assignee: General Electric Co
•
Filing: 1957-04-01
•
Granted: 1960-09-27
•
Expires: 1977-04-01
Abstract
No abstract record available.
Inventors
- 👤 Fred E Dickey
- 👤 Thomas E Coppinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:50
CPC Classifications
G; G01; G01R; G01R23/00; G01R23/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2232858A
Cited
US2324077A
Cited
US2425811A
Cited
US2510531A
Cited
GB712527A
Cited
US2679629A
Cited
US2816229A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-27 | 1964-03-28 | 1964-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-27 | 1968-03-28 | 1968-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-27 | 1972-03-28 | 1972-09-27 | $7700.00 | Window Closed / Lapsed |