Patent US2739303A successfully refreshed from Google Patents.
US2739303A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual range dial
Assignee: AIRCRAFT RADIO CORP
•
Filing: 1955-02-04
•
Granted: 1956-03-20
•
Expires: 1975-02-04
Abstract
No abstract record available.
Inventors
- 👤 Lars E Erickson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:17
CPC Classifications
H; H03; H03J; H03J1/00; H03J1/02; H03J1/04; H03J1/042
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-03-20 | 1959-09-19 | 1960-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-20 | 1963-09-19 | 1964-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-20 | 1967-09-19 | 1968-03-20 | $7700.00 | Window Closed / Lapsed |