US2807788A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio frequency choke coils
Assignee: RCA Corp
•
Filing: 1954-07-02
•
Granted: 1957-09-24
•
Expires: 1974-07-02
Abstract
No abstract record available.
Inventors
- 👤 George L Ackerly
- 👤 Hallan E Goldstine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:20
CPC Classifications
H; H01; H01F; H01F17/00; H01F17/04; H01F17/045
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2227493A
Cited
US2352166A
Cited
US2381782A
Cited
US2498561A
Cited
US2522731A
Cited
US2701335A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-23 | 1961-03-25 | 1961-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-23 | 1965-03-25 | 1965-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-23 | 1969-03-25 | 1969-09-24 | $7700.00 | Window Closed / Lapsed |