Patent US2462821A successfully refreshed from Google Patents.
Patent US2009711A successfully refreshed from Google Patents.
US2332540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for receiving frequency modulated waves
Assignee: Philco Radio and Television Corp
•
Filing: 1941-02-27
•
Granted: 1943-10-26
•
Expires: 1961-02-27
Abstract
No abstract record available.
Inventors
- 👤 Travis Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:54
CPC Classifications
H; H03; H03D; H03D3/00; H03D3/02; H03D3/24; H03D3/241
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1946-10-25 | 1947-04-26 | 1947-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-10-25 | 1951-04-26 | 1951-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-10-25 | 1955-04-26 | 1955-10-26 | $7700.00 | Window Closed / Lapsed |