Patent US2403562A successfully refreshed from Google Patents.
Patent US2169093A successfully refreshed from Google Patents.
US2169093A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical control system
Assignee: General Electric Co
•
Filing: 1937-01-02
•
Granted: 1939-08-08
•
Expires: 1957-01-02
Abstract
No abstract record available.
Inventors
- 👤 Martin A Edwards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:26
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) | 1942-08-07 | 1943-02-06 | 1943-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-08-07 | 1947-02-06 | 1947-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-08-07 | 1951-02-06 | 1951-08-08 | $7700.00 | Window Closed / Lapsed |