US2820422A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Railway car floor
Assignee: Pullman-Standard Car Manufacturing Co
•
Filing: 1952-02-07
•
Granted: 1958-01-21
•
Expires: 1972-02-07
Abstract
No abstract record available.
Inventors
- 👤 William H Peterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:56
CPC Classifications
B; B61; B61D; B61D17/00; B61D17/04; B61D17/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US487172A
Cited
US764219A
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US1486113A
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US2009056A
Cited
US2200159A
Cited
US2249590A
Cited
US2485648A
Cited
US2585961A
Cited
US2565705A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-20 | 1961-07-22 | 1962-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-20 | 1965-07-22 | 1966-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-20 | 1969-07-22 | 1970-01-21 | $7700.00 | Window Closed / Lapsed |