US2478007A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for measuring voltages or electric field intensities in high-frequency electrical transmission lines and wave guides
Assignee: EMI Ltd
•
Filing: 1944-02-07
•
Granted: 1949-08-02
•
Expires: 1964-02-07
Abstract
No abstract record available.
Inventors
- 👤 Collard John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:52
CPC Classifications
G; G01; G01R; G01R19/00; G01R19/28; G01R29/00; G01R29/08; G01R29/0864; G01R29/0878
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1705480A
Cited
US1059095A
Cited
AT111801B
Cited
US1893671A
Cited
US2106713A
Cited
US2191271A
Cited
GB548681A
Cited
US2395851A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-08-01 | 1953-01-31 | 1953-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-08-01 | 1957-01-31 | 1957-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-08-01 | 1961-01-31 | 1961-08-02 | $7700.00 | Window Closed / Lapsed |