US2559397A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Speed control with penalty means in continuous inductive train control systems
Assignee: SPX Technologies Inc
•
Filing: 1945-10-11
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Granted: 1951-07-03
•
Expires: 1965-10-11
Abstract
No abstract record available.
Inventors
- 👤 Charles S Bushnell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:38
CPC Classifications
B; B61; B61L; B61L15/00; B61L15/0062; B61L3/00; B61L3/16; B61L3/22; B61L3/221
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1810945A
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US2190505A
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US2326049A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-02 | 1955-01-01 | 1955-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-02 | 1959-01-01 | 1959-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-02 | 1963-01-01 | 1963-07-03 | $7700.00 | Window Closed / Lapsed |