Patent US2853682A successfully refreshed from Google Patents.
US2853682A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Waveguide filter
Assignee: RCA Corp
•
Filing: 1954-12-01
•
Granted: 1958-09-23
•
Expires: 1974-12-01
Abstract
No abstract record available.
Inventors
- 👤 Epstein Jess
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 01:00
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/20; H01P1/213; H01P1/2138
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2607849A
Cited
US2458579A
Cited
US2686901A
Cited
US2713151A
Cited
US2645769A
Cited
US2531447A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-22 | 1962-03-24 | 1962-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-22 | 1966-03-24 | 1966-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-22 | 1970-03-24 | 1970-09-23 | $7700.00 | Window Closed / Lapsed |