Patent US2564740A successfully refreshed from Google Patents.
US2564740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio-frequency transformer
Assignee: Individual
•
Filing: 1948-04-27
•
Granted: 1951-08-21
•
Expires: 1968-04-27
Abstract
No abstract record available.
Inventors
- 👤 Toth Emerick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:21
CPC Classifications
H; H03; H03H; H03H7/00; H03H7/01; H03H7/0153; H03H7/0161; H03H7/0169; H03H7/0176
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USRE22195E
Cited
US2106226A
Cited
US2283924A
Cited
US2144029A
Cited
US2227038A
Cited
US2336498A
Cited
US2303410A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-20 | 1955-02-19 | 1955-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-20 | 1959-02-19 | 1959-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-20 | 1963-02-19 | 1963-08-21 | $7700.00 | Window Closed / Lapsed |