US3323016A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transformer differential protection
Assignee: ABB Norden Holding AB
•
Filing: 1964-11-16
•
Granted: 1967-05-30
•
Expires: 1984-11-16
Abstract
No abstract record available.
Inventors
- 👤 Andersson Stig Gosta Lennart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:17
CPC Classifications
H; H02; H02H; H02H7/00; H02H7/04; H02H7/045
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2863100A
Cited
US3144590A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-05-29 | 1970-11-28 | 1971-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-29 | 1974-11-28 | 1975-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-29 | 1978-11-28 | 1979-05-30 | $7700.00 | Window Closed / Lapsed |