US2804024A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Welded bolster construction
Assignee: Pullman-Standard Car Manufacturing Co
•
Filing: 1953-05-20
•
Granted: 1957-08-27
•
Expires: 1973-05-20
Abstract
No abstract record available.
Inventors
- 👤 William G Boese
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:03
CPC Classifications
B; B61; B61F; B61F1/00; B61F1/08; B61F1/12; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2140268A
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US2122994A
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US2087530A
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US2184337A
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US2180799A
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US2244518A
Cited
US2309024A
Cited
US2671957A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-26 | 1961-02-25 | 1961-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-26 | 1965-02-25 | 1965-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-26 | 1969-02-25 | 1969-08-27 | $7700.00 | Window Closed / Lapsed |