Patent US2505501A successfully refreshed from Google Patents.
US2505501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Track cleaning car
Assignee: Pennsylvania Railroad Co
•
Filing: 1943-03-03
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Granted: 1950-04-25
•
Expires: 1963-03-03
Abstract
No abstract record available.
Inventors
- 👤 Robert N Miller
- 👤 William H Grindall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:30
CPC Classifications
E; E01; E01H; E01H8/00
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-04-24 | 1953-10-24 | 1954-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-24 | 1957-10-24 | 1958-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-24 | 1961-10-24 | 1962-04-25 | $7700.00 | Window Closed / Lapsed |