US2950549A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for removing ballast from beneath a railroad track
Assignee: Individual
•
Filing: 1958-03-10
•
Granted: 1960-08-30
•
Expires: 1978-03-10
Abstract
No abstract record available.
Inventors
- 👤 Royce G Kershaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:33
CPC Classifications
E; E01; E01B; E01B27/00; E01B27/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US823855A
Cited
US945335A
Cited
FR850044A
Cited
US2284035A
Cited
US2609619A
Cited
DE907404C
Cited
US2865621A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-30 | 1964-02-29 | 1964-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-30 | 1968-02-29 | 1968-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-30 | 1972-02-29 | 1972-08-30 | $7700.00 | Window Closed / Lapsed |