US2003945A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric controlling apparatus
Assignee: Ward Leonard Electric Co
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Filing: 1931-09-05
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Granted: 1935-06-04
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Expires: 1951-09-05
Abstract
No abstract record available.
Inventors
- 👤 Frank G Logan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:57
CPC Classifications
G; G05; G05F; G05F1/00; G05F1/10; G05F1/12; G05F1/32; G05F1/34; H; H03; H03F; H03F9/00; H03F9/02
Claims Analysis
Total Claims: 0
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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) | 1938-06-03 | 1938-12-03 | 1939-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-06-03 | 1942-12-03 | 1943-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-06-03 | 1946-12-03 | 1947-06-04 | $7700.00 | Window Closed / Lapsed |