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US2668457A
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Hand brake for railway cars
Assignee: AJAX CONS Co
•
Filing: 1950-08-05
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Granted: 1954-02-09
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Expires: 1970-08-05
Abstract
No abstract record available.
Inventors
- 👤 Jr Frank E Bretz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:32
CPC Classifications
B; B61; B61H; B61H13/00; B61H13/02; B61H13/04; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20396; Y10T74/20474; Y10T74/2048
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2166201A
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US2189978A
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US2268228A
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US2267037A
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US2282736A
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US2280180A
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US2299402A
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US2310135A
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US2416251A
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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) | 1957-02-08 | 1957-08-10 | 1958-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-08 | 1961-08-10 | 1962-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-08 | 1965-08-10 | 1966-02-09 | $7700.00 | Window Closed / Lapsed |