Patent US3657601A successfully refreshed from Google Patents.
US3206569A
Expired / Lapsed
US
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Protective means for transformer tap changer
Assignee: Individual
•
Filing: 1964-12-17
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Granted: 1965-09-14
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Expires: 1984-12-17
Abstract
No abstract record available.
Inventors
- 👤 Orin P Mccarty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:20
CPC Classifications
H; H01; H01H; H01H9/00; H01H9/0005; H01H9/0038; H01F; H01F27/00; H01F27/40; H01F27/402; H01F27/404
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1361966A
Cited
US1392160A
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US1642405A
Cited
US2112064A
Cited
US2246182A
Cited
US2360147A
Cited
US2469203A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-13 | 1969-03-15 | 1969-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-13 | 1973-03-15 | 1973-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-13 | 1977-03-15 | 1977-09-14 | $7700.00 | Window Closed / Lapsed |