US1512288A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic train-control system
Assignee: SPX Technologies Inc
•
Filing: 1919-04-11
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Granted: 1924-10-21
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Expires: 1939-04-11
Abstract
No abstract record available.
Inventors
- 👤 Winthrop K Howe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:41
CPC Classifications
B; B61; B61L; B61L3/00; B61L3/02; B61L3/08; B61L3/12; B61L3/121
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) | 1927-10-21 | 1928-04-21 | 1928-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1931-10-21 | 1932-04-21 | 1932-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1935-10-21 | 1936-04-21 | 1936-10-21 | $7700.00 | Window Closed / Lapsed |