Patent US2131740A successfully refreshed from Google Patents.
Patent US2970250A successfully refreshed from Google Patents.
US2970250A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-speed electric-car control
Assignee: Westinghouse Electric Corp
•
Filing: 1957-07-31
•
Granted: 1961-01-31
•
Expires: 1977-07-31
Abstract
No abstract record available.
Inventors
- 👤 Lloyd J Hibbard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:44
CPC Classifications
B; B60; B60L; B60L15/00; B60L15/02; B60L15/04; B60L2200/00; B60L2200/26; Y; Y02; Y02T; Y02T10/00; Y02T10/60; Y02T10/64
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-01-31 | 1964-08-01 | 1965-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-31 | 1968-08-01 | 1969-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-31 | 1972-08-01 | 1973-01-31 | $7700.00 | Window Closed / Lapsed |