US2730682A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tuning network structure
Assignee: Zenith Electronics LLC
•
Filing: 1952-05-01
•
Granted: 1956-01-10
•
Expires: 1972-05-01
Abstract
No abstract record available.
Inventors
- 👤 Frank A Wood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:15
CPC Classifications
H; H01; H01F; H01F21/00; H01F21/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1577794A
Cited
GB359168A
Cited
US2103035A
Cited
US2430990A
Cited
US2611088A
Cited
US2496183A
Cited
US2614248A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-09 | 1959-07-11 | 1960-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-09 | 1963-07-11 | 1964-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-09 | 1967-07-11 | 1968-01-10 | $7700.00 | Window Closed / Lapsed |