US1513028A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Direction valve for automatic train-control apparatus
Assignee: OTIS AUTOMATIC TRAIN CONTROL I
•
Filing: 1923-05-01
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Granted: 1924-10-28
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Expires: 1943-05-01
Abstract
No abstract record available.
Inventors
- 👤 Jr David J Bissell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:14
CPC Classifications
B; B60; B60T; B60T17/00; B60T17/18; B60T17/20; Y; Y10; Y10T; Y10T137/00; Y10T137/1624; Y10T137/1632; Y10T137/8593; Y10T137/86493; Y10T137/86831
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1927-10-28 | 1928-04-28 | 1928-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1931-10-28 | 1932-04-28 | 1932-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1935-10-28 | 1936-04-28 | 1936-10-28 | $7700.00 | Window Closed / Lapsed |