US2829350A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mechanical filter with coupling wires
Assignee: Collins Radio Co
•
Filing: 1955-08-16
•
Granted: 1958-04-01
•
Expires: 1975-08-16
Abstract
No abstract record available.
Inventors
- 👤 Lloyd M Ibsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:56
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)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-31 | 1961-09-30 | 1962-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-31 | 1965-09-30 | 1966-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-31 | 1969-09-30 | 1970-04-01 | $7700.00 | Window Closed / Lapsed |