Patent US4225120A successfully refreshed from Google Patents.
Patent US2548913A successfully refreshed from Google Patents.
US2548913A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio receiver with logarithmic response circuit
Assignee: Individual
•
Filing: 1946-04-17
•
Granted: 1951-04-17
•
Expires: 1966-04-17
Abstract
No abstract record available.
Inventors
- 👤 Edmund D Schreiner
- 👤 Howland Bradford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:58
CPC Classifications
H; H03; H03G; H03G3/00; H03G3/20; H03G7/00; H03G7/001
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1875157A
Cited
US2014509A
Cited
US2104336A
Cited
US2088210A
Cited
US2084135A
Cited
US2227050A
Cited
US2182329A
Cited
US2239906A
Cited
US2250581A
Cited
US2383420A
Cited
US2337932A
Cited
US2434155A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-16 | 1954-10-16 | 1955-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-16 | 1958-10-16 | 1959-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-16 | 1962-10-16 | 1963-04-17 | $7700.00 | Window Closed / Lapsed |