US2679581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antenna tuning system
Assignee: Westinghouse Electric Corp
•
Filing: 1950-05-20
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Granted: 1954-05-25
•
Expires: 1970-05-20
Abstract
No abstract record available.
Inventors
- 👤 Mark I Jacob
- 👤 Robert J Howell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:29
CPC Classifications
H; H03; H03J; H03J7/00; H03J7/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2077223A
Cited
FR878645A
Cited
US2440081A
Cited
US2480820A
Cited
US2388233A
Cited
US2559023A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-24 | 1957-11-23 | 1958-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-24 | 1961-11-23 | 1962-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-24 | 1965-11-23 | 1966-05-25 | $7700.00 | Window Closed / Lapsed |