Patent US2437428A successfully refreshed from Google Patents.
US2437428A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric motor system and method of controlling the same
Assignee: Thomas A Edison Inc
•
Filing: 1943-05-19
•
Granted: 1948-03-09
•
Expires: 1963-05-19
Abstract
No abstract record available.
Inventors
- 👤 Hornbostel John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:54
CPC Classifications
H; H02; H02K; H02K25/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1077179A
Cited
US1284219A
Cited
US1533211A
Cited
US1625314A
Cited
US1723084A
Cited
US1937739A
Cited
US2181841A
Cited
US2233933A
Cited
US2266037A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-03-09 | 1951-09-08 | 1952-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-03-09 | 1955-09-08 | 1956-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-03-09 | 1959-09-08 | 1960-03-09 | $7700.00 | Window Closed / Lapsed |