Patent US2693579A successfully refreshed from Google Patents.
US2693579A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Longitudinal support of mechanical filter
Assignee: Collins Radio Co
•
Filing: 1952-04-21
•
Granted: 1954-11-02
•
Expires: 1972-04-21
Abstract
No abstract record available.
Inventors
- 👤 Melvin L Doelz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:50
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/46; H03H9/48; H03H9/50; H03H9/02; H03H9/125; H03H9/135
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1678116A
Cited
DE706272C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-11-01 | 1958-05-03 | 1958-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-01 | 1962-05-03 | 1962-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-01 | 1966-05-03 | 1966-11-02 | $7700.00 | Window Closed / Lapsed |