US2528167A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Band-spread tuning inductance device
Assignee: RCA Corp
•
Filing: 1948-03-23
•
Granted: 1950-10-31
•
Expires: 1968-03-23
Abstract
No abstract record available.
Inventors
- 👤 Pan Wen Yuan
- 👤 Longo John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:21
CPC Classifications
H; H01; H01F; H01F21/00; H01F21/02; H01F21/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US377217A
Cited
FR560396A
Cited
US1898792A
Cited
US2259250A
Cited
US2363101A
Cited
US2325279A
Cited
US2417188A
Cited
US2394391A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-10-30 | 1954-05-01 | 1954-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-30 | 1958-05-01 | 1958-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-30 | 1962-05-01 | 1962-10-31 | $7700.00 | Window Closed / Lapsed |