US2520754A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Railway tie
Assignee: Individual
•
Filing: 1945-02-12
•
Granted: 1950-08-29
•
Expires: 1965-02-12
Abstract
No abstract record available.
Inventors
- 👤 Karl F Beisel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:29
CPC Classifications
E; E01; E01B; E01B3/00; E01B3/28; E01B3/32; E01B9/00; E01B9/66
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US722200A
Cited
US885863A
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US940740A
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US1058477A
Cited
US1082433A
Cited
US1187284A
Cited
US1182808A
Cited
US1214339A
Cited
US1458945A
Cited
US1788446A
Cited
US2128530A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-28 | 1954-02-27 | 1954-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-28 | 1958-02-27 | 1958-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-28 | 1962-02-27 | 1962-08-29 | $7700.00 | Window Closed / Lapsed |