US2421084A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric motor control system
Assignee: General Controls Co
•
Filing: 1944-06-09
•
Granted: 1947-05-27
•
Expires: 1964-06-09
Abstract
No abstract record available.
Inventors
- 👤 William A Ray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:36
CPC Classifications
H; H02; H02P; H02P7/00; H02P7/03
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US435899A
Cited
GB190228539A
Cited
US1078815A
Cited
US967210A
Cited
US1359333A
Cited
US1455618A
Cited
US1898242A
Cited
US1555071A
Cited
US2180205A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-05-26 | 1950-11-25 | 1951-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-05-26 | 1954-11-25 | 1955-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-05-26 | 1958-11-25 | 1959-05-27 | $7700.00 | Window Closed / Lapsed |