US2716189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency selective circuit
Assignee: RCA Corp
•
Filing: 1952-09-30
•
Granted: 1955-08-23
•
Expires: 1972-09-30
Abstract
No abstract record available.
Inventors
- 👤 William R Ayres
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:18
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/28; G01S7/285; G01S7/292; G01S7/2923; G01S7/52; G01S7/523; G01S7/526; G01S7/527
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2118626A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-08-22 | 1959-02-21 | 1959-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-08-22 | 1963-02-21 | 1963-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-08-22 | 1967-02-21 | 1967-08-23 | $7700.00 | Window Closed / Lapsed |