US2620902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic brake adjuster for hopper cars
Assignee: Universal Railway Devices Co
•
Filing: 1948-02-28
•
Granted: 1952-12-09
•
Expires: 1968-02-28
Abstract
No abstract record available.
Inventors
- 👤 Wilson Jack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:36
CPC Classifications
B; B61; B61H; B61H15/00; B61H15/0007; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20576; Y10T74/20582; Y10T74/206
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US599662A
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US1144453A
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US1654089A
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US1737922A
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US1809729A
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US1935607A
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US1964138A
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US1971368A
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US2433139A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-09 | 1956-06-09 | 1956-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-09 | 1960-06-09 | 1960-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-09 | 1964-06-09 | 1964-12-09 | $7700.00 | Window Closed / Lapsed |