US2564461A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Instrument for use in leveling railways
Assignee: Individual
•
Filing: 1947-04-30
•
Granted: 1951-08-14
•
Expires: 1967-04-30
Abstract
No abstract record available.
Inventors
- 👤 Samuel A Bowers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:19
CPC Classifications
G; G01; G01C; G01C5/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US420245A
Cited
US1174034A
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US1199059A
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US1239083A
Cited
US1359133A
Cited
US1366498A
Cited
US1927178A
Cited
GB409365A
Cited
US2414777A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-13 | 1955-02-12 | 1955-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-13 | 1959-02-12 | 1959-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-13 | 1963-02-12 | 1963-08-14 | $7700.00 | Window Closed / Lapsed |