Patent US2425657A successfully refreshed from Google Patents.
US2425657A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Short-wave apparatus
Assignee: RCA Corp
•
Filing: 1943-12-13
•
Granted: 1947-08-12
•
Expires: 1963-12-13
Abstract
No abstract record available.
Inventors
- 👤 Tunick Harry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:57
CPC Classifications
H; H01; H01J; H01J25/00; H01J25/02; H01J25/04; H01J25/68
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1873842A
Cited
US1988609A
Cited
US1934400A
Cited
US2104801A
Cited
US2132654A
Cited
US2243202A
Cited
US2269456A
Cited
US2190511A
Cited
US2227372A
Cited
US2201978A
Cited
US2225447A
Cited
US2276247A
Cited
US2250104A
Cited
US2278210A
Cited
US2337214A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-08-11 | 1951-02-10 | 1951-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-08-11 | 1955-02-10 | 1955-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-08-11 | 1959-02-10 | 1959-08-12 | $7700.00 | Window Closed / Lapsed |