Patent US2895902A successfully refreshed from Google Patents.
Patent US5355147A successfully refreshed from Google Patents.
Patent JPS63314101A successfully refreshed from Google Patents.
Patent CA653264A successfully refreshed from Google Patents.
Patent US3090907A successfully refreshed from Google Patents.
US3090907A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intermediate frequency transformer
Assignee: Individual
•
Filing: 1960-05-11
•
Granted: 1963-05-21
•
Expires: 1980-05-11
Abstract
No abstract record available.
Inventors
- 👤 Maeda Hisao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:59
CPC Classifications
H; H01; H01F; H01F17/00; H01F17/04; H01F17/043
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2547085A
Cited
US2483919A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-05-20 | 1966-11-19 | 1967-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-20 | 1970-11-19 | 1971-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-20 | 1974-11-19 | 1975-05-21 | $7700.00 | Window Closed / Lapsed |