Patent US2658191A successfully refreshed from Google Patents.
US2658191A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric signal for trackless trolley coaches
Assignee: Cheatham Electric Switching Device Co
•
Filing: 1951-07-05
•
Granted: 1953-11-03
•
Expires: 1971-07-05
Abstract
No abstract record available.
Inventors
- 👤 Samuel S Stolp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:19
CPC Classifications
B; B60; B60L; B60L3/00; G; G01; G01R; G01R27/00; G01R27/02; G01R27/16; G01R27/18
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2360288A
Cited
US2478147A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-02 | 1957-05-04 | 1957-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-02 | 1961-05-04 | 1961-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-02 | 1965-05-04 | 1965-11-03 | $7700.00 | Window Closed / Lapsed |