US2831632A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic speed controlling apparatus
Assignee: Westinghouse Electric Corp
•
Filing: 1952-01-26
•
Granted: 1958-04-22
•
Expires: 1972-01-26
Abstract
No abstract record available.
Inventors
- 👤 John R Boykin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:32
CPC Classifications
G; G05; G05D; G05D27/00; G05D27/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB619139A
Cited
US2491921A
Cited
US2491922A
Cited
US2406309A
Cited
US2541666A
Cited
US2496730A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-21 | 1961-10-21 | 1962-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-21 | 1965-10-21 | 1966-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-21 | 1969-10-21 | 1970-04-22 | $7700.00 | Window Closed / Lapsed |