US2229952A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic amplifier
Assignee: General Electric Co
•
Filing: 1938-10-19
•
Granted: 1941-01-28
•
Expires: 1958-10-19
Abstract
No abstract record available.
Inventors
- 👤 Austyn L Whiteley
- 👤 Leslie C Ludbrook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:03
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/20; C01B33/36; C01B33/46; H; H03; H03F; H03F9/00; H03F9/02; H03F9/04; H01; H01F; H01F29/00; H01F29/14
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1944-01-28 | 1944-07-29 | 1945-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-01-28 | 1948-07-29 | 1949-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-01-28 | 1952-07-29 | 1953-01-28 | $7700.00 | Window Closed / Lapsed |