US2855508A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual frequency resonant circuits
Assignee: RCA Corp
•
Filing: 1954-03-22
•
Granted: 1958-10-07
•
Expires: 1974-03-22
Abstract
No abstract record available.
Inventors
- 👤 Barlow Niles Linden
- 👤 Neumann Karl Ludwig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:44
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/02; H04B1/04
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1624006A
Cited
US1627767A
Cited
US1706030A
Cited
US1836594A
Cited
US1851905A
Cited
US1812624A
Cited
US2151814A
Cited
US2154692A
Cited
US2189063A
Cited
US2312761A
Cited
US2668198A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-06 | 1962-04-07 | 1962-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-06 | 1966-04-07 | 1966-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-06 | 1970-04-07 | 1970-10-07 | $7700.00 | Window Closed / Lapsed |