US2973489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency selective circuit
Assignee: Lanteris Space LLC
•
Filing: 1956-01-10
•
Granted: 1961-02-28
•
Expires: 1976-01-10
Abstract
No abstract record available.
Inventors
- 👤 William E Bradley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:46
CPC Classifications
H; H03; H03H; H03H2/00; H03H2/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1315584A
Cited
US2202700A
Cited
US2270949A
Cited
US2589259A
Cited
US2694186A
Cited
US2802992A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-02-28 | 1964-08-29 | 1965-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-02-28 | 1968-08-29 | 1969-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-02-28 | 1972-08-29 | 1973-02-28 | $7700.00 | Window Closed / Lapsed |