US2916612A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Railway signaling system with automatic meets between trains
Assignee: SPX Technologies Inc
•
Filing: 1956-12-24
•
Granted: 1959-12-08
•
Expires: 1976-12-24
Abstract
No abstract record available.
Inventors
- 👤 Thomas P Marple
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:56
CPC Classifications
B; B61; B61L; B61L7/00; B61L7/06; B61L7/08; B61L7/088; B61L23/00; B61L23/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2082436A
Cited
US1759383A
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US2206550A
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US2315887A
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US2399734A
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US2700728A
Cited
US2731632A
Cited
US2794117A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-07 | 1963-06-08 | 1963-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-07 | 1967-06-08 | 1967-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-07 | 1971-06-08 | 1971-12-08 | $7700.00 | Window Closed / Lapsed |