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US2835208A
Expired / Lapsed
US
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Ballast car door operating mechanism
Assignee: Pullman-Standard Car Manufacturing Co
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Filing: 1954-01-21
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Granted: 1958-05-20
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Expires: 1974-01-21
Abstract
No abstract record available.
Inventors
- 👤 Clyde B Faverty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:08
CPC Classifications
B; B61; B61D; B61D7/00; B61D7/14; B61D7/16; B61D7/24; B61D7/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR392921A
Cited
US1174677A
Cited
US1209809A
Cited
FR567132A
Cited
US1609297A
Cited
US1800832A
Cited
FR907911A
Cited
FR54780E
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-19 | 1961-11-18 | 1962-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-19 | 1965-11-18 | 1966-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-19 | 1969-11-18 | 1970-05-20 | $7700.00 | Window Closed / Lapsed |