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US2057593A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Steel crosstie for railroads
Assignee: Individual
•
Filing: 1935-05-21
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Granted: 1936-10-13
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Expires: 1955-05-21
Abstract
No abstract record available.
Inventors
- 👤 Clark H Riggle
- 👤 Leo L Riggle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:18
CPC Classifications
E; E01; E01B; E01B3/00; E01B3/16; E01B3/18
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) | 1939-10-13 | 1940-04-13 | 1940-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-10-13 | 1944-04-13 | 1944-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-10-13 | 1948-04-13 | 1948-10-13 | $7700.00 | Window Closed / Lapsed |