US2150167A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Current control and discharge of transient overvoltages
Assignee: Electric Service Supplies Co
•
Filing: 1935-09-23
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Granted: 1939-03-14
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Expires: 1955-09-23
Abstract
No abstract record available.
Inventors
- 👤 Hutchins Otis
- 👤 Mcfarlin John Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:51
CPC Classifications
H; H01; H01T; H01T1/00; H01T1/16; H01C; H01C7/00; H01C7/10; H01C7/105; H01C7/118
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) | 1942-03-13 | 1942-09-12 | 1943-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-03-13 | 1946-09-12 | 1947-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-03-13 | 1950-09-12 | 1951-03-14 | $7700.00 | Window Closed / Lapsed |