US2544658A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric induction apparatus
Assignee: General Electric Co
•
Filing: 1947-10-16
•
Granted: 1951-03-13
•
Expires: 1967-10-16
Abstract
No abstract record available.
Inventors
- 👤 Entremont Franklin R D
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:56
CPC Classifications
H; H01; H01F; H01F38/00; H01F38/20; H01F38/22; H01F38/28; H01F38/30
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1517770A
Cited
US1720943A
Cited
US1880809A
Cited
US2235425A
Cited
US2246167A
Cited
US2349782A
Cited
US2339432A
Cited
US2380203A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-03-12 | 1954-09-11 | 1955-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-12 | 1958-09-11 | 1959-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-12 | 1962-09-11 | 1963-03-13 | $7700.00 | Window Closed / Lapsed |