US2439096A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric motor control system
Assignee: Bristol Co
•
Filing: 1943-09-29
•
Granted: 1948-04-06
•
Expires: 1963-09-29
Abstract
No abstract record available.
Inventors
- 👤 Pattee John Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:54
CPC Classifications
G; G05; G05D; G05D3/00; G05D3/12; G05D3/14; G05D3/1472
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2115834A
Cited
US2112218A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-04-06 | 1951-10-06 | 1952-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-04-06 | 1955-10-06 | 1956-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-04-06 | 1959-10-06 | 1960-04-06 | $7700.00 | Window Closed / Lapsed |