Patent US2771041A successfully refreshed from Google Patents.
US2771041A
Expired / Lapsed
US
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Panel structure, particularly letterboard for railway cars
Assignee: ThyssenKrupp Budd Co
•
Filing: 1950-12-28
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Granted: 1956-11-20
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Expires: 1970-12-28
Abstract
No abstract record available.
Inventors
- 👤 Fuchs Reinhard
- 👤 Edward J Hochreiter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:01
CPC Classifications
B; B61; B61D; B61D17/00; B61D17/04; B61D17/08; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/49867; Y10T29/49869
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US854331A
Cited
US1472128A
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US1643742A
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US2035113A
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US2074433A
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US2223746A
Cited
US2190334A
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US2282823A
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US2291621A
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US2387134A
Cited
US2314979A
Cited
US2410191A
Cited
US2504111A
Cited
US2502703A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-20 | 1960-05-21 | 1960-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-20 | 1964-05-21 | 1964-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-20 | 1968-05-21 | 1968-11-20 | $7700.00 | Window Closed / Lapsed |