US3458805A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric field meter having a pair of rotating electrodes for measuring the strength and direction of an electric field
Assignee: United States Department of the Army
•
Filing: 1965-11-04
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Granted: 1969-07-29
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Expires: 1985-11-04
Abstract
No abstract record available.
Inventors
- 👤 Heinz W Kasemir
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:33
CPC Classifications
G; G01; G01R; G01R5/00; G01R5/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3253207A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-28 | 1973-01-27 | 1973-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-28 | 1977-01-27 | 1977-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-28 | 1981-01-27 | 1981-07-29 | $7700.00 | Window Closed / Lapsed |