Patent US1548949A successfully refreshed from Google Patents.
Patent US2443935A successfully refreshed from Google Patents.
US2443935A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Superheterodyne radio receiver
Assignee: General Electric Co
•
Filing: 1942-01-07
•
Granted: 1948-06-22
•
Expires: 1962-01-07
Abstract
No abstract record available.
Inventors
- 👤 Richard F Shea
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:42
CPC Classifications
H; H03; H03J; H03J3/00; H03J3/02; H03J3/10
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2062379A
Cited
US2137266A
Cited
GB490206A
Cited
US2210379A
Cited
US2238752A
Cited
US2250366A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-06-22 | 1951-12-22 | 1952-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-22 | 1955-12-22 | 1956-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-22 | 1959-12-22 | 1960-06-22 | $7700.00 | Window Closed / Lapsed |