US2821146A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic sectional control system for track-borne carriers
Assignee: Old Carco LLC
•
Filing: 1952-08-02
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Granted: 1958-01-28
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Expires: 1972-08-02
Abstract
No abstract record available.
Inventors
- 👤 Raymond D Mahrle
- 👤 Paul V Mackey
- 👤 Kuzel Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:53
CPC Classifications
E; E01; E01B; E01B25/00; E01B25/22; B; B66; B66C; B66C7/00; B66C2700/00; B66C2700/01; B66C2700/012; B66C2700/018
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
AT8283B
Cited
GB382973A
Cited
US2084879A
Cited
US2201013A
Cited
US2385917A
Cited
US2688934A
Cited
US2614506A
Cited
US2688931A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-27 | 1961-07-29 | 1962-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-27 | 1965-07-29 | 1966-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-27 | 1969-07-29 | 1970-01-28 | $7700.00 | Window Closed / Lapsed |