Patent US2521536A successfully refreshed from Google Patents.
US2521536A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric induction device
Assignee: General Electric Co
•
Filing: 1948-06-05
•
Granted: 1950-09-05
•
Expires: 1968-06-05
Abstract
No abstract record available.
Inventors
- 👤 Robert T Reardon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:26
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/28; H01F27/2823
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1306815A
Cited
US1406328A
Cited
US1406002A
Cited
US1792756A
Cited
US1836615A
Cited
US2075906A
Cited
US1972319A
Cited
US2223737A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-04 | 1954-03-06 | 1954-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-04 | 1958-03-06 | 1958-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-04 | 1962-03-06 | 1962-09-05 | $7700.00 | Window Closed / Lapsed |