US2821623A
Expired / Lapsed
US
⏱️ 0.0 years remaining
End-loaded long-line superheterodyne tuner having tracking means
Assignee: Standard Coil Products Co Inc
•
Filing: 1954-01-20
•
Granted: 1958-01-28
•
Expires: 1974-01-20
Abstract
No abstract record available.
Inventors
- 👤 Edwin P Thias
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:38
CPC Classifications
H; H03; H03J; H03J3/00; H03J3/28; H03J3/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1743019A
Cited
GB334996A
Cited
US2223835A
Cited
US2277638A
Cited
US2408895A
Cited
US2398721A
Cited
US2501671A
Cited
US2601445A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-27 | 1961-07-29 | 1962-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-27 | 1965-07-29 | 1966-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-27 | 1969-07-29 | 1970-01-28 | $7700.00 | Window Closed / Lapsed |