Patent US2394937A successfully refreshed from Google Patents.
US2394937A
Expired / Lapsed
US
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Excess-voltage protective structure for overhead conductors
Assignee: Individual
•
Filing: 1943-04-27
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Granted: 1946-02-12
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Expires: 1963-04-27
Abstract
No abstract record available.
Inventors
- 👤 Ralph R Pittman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:01
CPC Classifications
H; H01; H01T; H01T1/00; H01T1/02; H01T1/08; H01T1/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1949-02-11 | 1949-08-13 | 1950-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-02-11 | 1953-08-13 | 1954-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-02-11 | 1957-08-13 | 1958-02-12 | $7700.00 | Window Closed / Lapsed |