US2657306A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio receiving circuit arrangement
Assignee: Individual
•
Filing: 1946-08-21
•
Granted: 1953-10-27
•
Expires: 1966-08-21
Abstract
No abstract record available.
Inventors
- 👤 Williams Frederic Calland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:30
CPC Classifications
H; H04; H04W; H04W84/00; H04W84/02; B; B65; B65B; B65B43/00; B65B43/12; B65B43/14; B65B43/22; F; F16; F16D; F16D1/00; F16D1/06; G; G01; G01S; G01S13/00; G01S13/74; G01S13/76; G01S13/767; G01S13/78; G01S13/87; H03; H03D; H03D11/00; H03D11/02; H03F; H03F1/00; H03F1/52; H03F1/54; H03F1/542; B31; B31B; B31B2105/00; B31B2120/00; B31B2120/40; B31B2120/408
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
GB243407A
Cited
GB307177A
Cited
US2006803A
Cited
US2045700A
Cited
US2147595A
Cited
US2414992A
Cited
US2429513A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-26 | 1957-04-27 | 1957-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-26 | 1961-04-27 | 1961-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-26 | 1965-04-27 | 1965-10-27 | $7700.00 | Window Closed / Lapsed |