US2986628A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Track circuits
Assignee: Forges et Ateliers de Constructions Electriques de Jeumont SA
•
Filing: 1957-05-27
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Granted: 1961-05-30
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Expires: 1977-05-27
Abstract
No abstract record available.
Inventors
- 👤 Robert C Devy
- 👤 Jacques F Peslier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:39
CPC Classifications
B; B61; B61L; B61L23/00; B61L23/08; B61L23/12; B61L1/00; B61L1/18; B61L1/181; B61L1/188
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1482122A
Cited
US1736816A
Cited
US1758540A
Cited
US1810024A
Cited
US2144847A
Cited
US2147688A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-29 | 1964-11-28 | 1965-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-29 | 1968-11-28 | 1969-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-29 | 1972-11-28 | 1973-05-30 | $7700.00 | Window Closed / Lapsed |