US2754482A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Band-pass circuit arrangements
Assignee: EMI Ltd
•
Filing: 1950-01-24
•
Granted: 1956-07-10
•
Expires: 1970-01-24
Abstract
No abstract record available.
Inventors
- 👤 Percival William Spencer
- 👤 White Eric Lawrence Casling
- 👤 Leyton Eric Mcphail
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:40
CPC Classifications
H; H03; H03H; H03H7/00; H03H7/01; H03H7/09; H03H7/17; H03H7/1741; H03H7/1758; H03H7/1775; H03H1/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1850754A
Cited
US1867746A
Cited
US2237415A
Cited
US2267445A
Cited
US2265067A
Cited
US2462903A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-10 | 1960-01-09 | 1960-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-10 | 1964-01-09 | 1964-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-10 | 1968-01-09 | 1968-07-10 | $7700.00 | Window Closed / Lapsed |