US2738468A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wave guide filters
Assignee: RCA Corp
•
Filing: 1950-07-24
•
Granted: 1956-03-13
•
Expires: 1970-07-24
Abstract
No abstract record available.
Inventors
- 👤 William A Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:09
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/20
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2129712A
Cited
US2142138A
Cited
US2261130A
Cited
US2531437A
Cited
US2407911A
Cited
US2436828A
Cited
US2576186A
Cited
US2601806A
Cited
US2623121A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-03-13 | 1959-09-12 | 1960-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-13 | 1963-09-12 | 1964-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-13 | 1967-09-12 | 1968-03-13 | $7700.00 | Window Closed / Lapsed |