US2452480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Defect detector for railway car wheels
Assignee: Individual
•
Filing: 1945-08-17
•
Granted: 1948-10-26
•
Expires: 1965-08-17
Abstract
No abstract record available.
Inventors
- 👤 James J Mason
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:28
CPC Classifications
B; B61; B61L; B61L1/00; B61L1/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US929444A
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US1149787A
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US1378465A
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US1908204A
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US1818970A
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US1877184A
Cited
US1977170A
Cited
US2095616A
Cited
US2277099A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-10-26 | 1952-04-26 | 1952-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-10-26 | 1956-04-26 | 1956-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-10-26 | 1960-04-26 | 1960-10-26 | $7700.00 | Window Closed / Lapsed |