Patent US2447576A successfully refreshed from Google Patents.
US2447576A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable radio receiver
Assignee: Zenith Electronics LLC
•
Filing: 1944-03-11
•
Granted: 1948-08-24
•
Expires: 1964-03-11
Abstract
No abstract record available.
Inventors
- 👤 Gilbert E Gustafson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:02
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/12; H01Q1/22; H01Q1/24
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
SE79094C1
Cited
US783003A
Cited
US1093110A
Cited
US1640870A
Cited
US1809028A
Cited
US1901808A
Cited
US2202930A
Cited
US2255897A
Cited
US2295191A
Cited
US2315315A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-08-24 | 1952-02-23 | 1952-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-08-24 | 1956-02-23 | 1956-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-08-24 | 1960-02-23 | 1960-08-24 | $7700.00 | Window Closed / Lapsed |