US2594644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio receiver tuning switch
Assignee: Individual
•
Filing: 1947-12-11
•
Granted: 1952-04-29
•
Expires: 1967-12-11
Abstract
No abstract record available.
Inventors
- 👤 Hansen Harry Clifford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:07
CPC Classifications
H; H03; H03J; H03J5/00; H03J5/02; H03J5/04; H03J5/12
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1244110A
Cited
US1981967A
Cited
US1951542A
Cited
US2146269A
Cited
US2196433A
Cited
US2213845A
Cited
US2289475A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-29 | 1955-10-29 | 1956-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-29 | 1959-10-29 | 1960-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-29 | 1963-10-29 | 1964-04-29 | $7700.00 | Window Closed / Lapsed |