US2669697A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transformer coupling network
Assignee: TRANSFORMER ENGINEERS
•
Filing: 1948-07-15
•
Granted: 1954-02-16
•
Expires: 1968-07-15
Abstract
No abstract record available.
Inventors
- 👤 Raymond C Olesen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:11
CPC Classifications
H; H01; H01F; H01F19/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1333111A
Cited
US1430808A
Cited
US1530648A
Cited
US1511013A
Cited
US1530649A
Cited
US1606817A
Cited
US1762737A
Cited
US2125119A
Cited
US2301245A
Cited
US2333148A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-15 | 1957-08-17 | 1958-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-15 | 1961-08-17 | 1962-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-15 | 1965-08-17 | 1966-02-16 | $7700.00 | Window Closed / Lapsed |