Patent US2530472A successfully refreshed from Google Patents.
US2530472A
Expired / Lapsed
US
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Tramming locomotive
Assignee: Jeffrey Manufacturing Co
•
Filing: 1945-07-21
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Granted: 1950-11-21
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Expires: 1965-07-21
Abstract
No abstract record available.
Inventors
- 👤 Arthur L Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:25
CPC Classifications
B; B61; B61C; B61C3/00; B61C3/02; B61J; B61J3/00; B61J3/12; Y; Y02; Y02T; Y02T30/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US732847A
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US986981A
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US1002433A
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US1410596A
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US1583241A
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US1926966A
Cited
US2142622A
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US2323913A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-20 | 1954-05-22 | 1954-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-20 | 1958-05-22 | 1958-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-20 | 1962-05-22 | 1962-11-21 | $7700.00 | Window Closed / Lapsed |