US2930006A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mechanical filter with impedance matching discs
Assignee: Collins Radio Co
•
Filing: 1954-06-16
•
Granted: 1960-03-22
•
Expires: 1974-06-16
Abstract
No abstract record available.
Inventors
- 👤 James C Hathaway
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:08
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/02; H03H9/125; H03H9/135; H03H9/46; H03H9/48; H03H9/50
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2161593A
Cited
US2662217A
Cited
US2617882A
Cited
US2693579A
Cited
US2656516A
Cited
US2762985A
Cited
US2774042A
Cited
US2777999A
Cited
US2802992A
Cited
US2821686A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-22 | 1963-09-21 | 1964-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-22 | 1967-09-21 | 1968-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-22 | 1971-09-21 | 1972-03-22 | $7700.00 | Window Closed / Lapsed |