Patent US3587477A successfully refreshed from Google Patents.
US3587477A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Railroad car door means
Assignee: Pullman Standard Inc
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Filing: 1968-12-30
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Granted: 1971-06-28
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Expires: 1988-12-30
Abstract
Abstract IN A RAILROAD BOX CAR, A PAIR OF SLIDABLE DOORS EXTENDING THE LENGTH OF THE CAR, THE UPPER AND LOWER DOOR FRAMING OF EACH DOOR PROVIDING A BAFFLE SEAL ARRANGEMENT WITH THE UPPER SIDE PLATE AND LOWER SIDE SILL, THE UPPER AND LOWER FRAMING CARRYING ROLLER MEANS MOUNTABLE ON TRACK STRUCTURE ON THE SIDE PLATE AND SIDE SILL TO SLIDINGLY SUPPORT THE DOORS FOR MOVEMENT TOWARD AND AWAY FROM ONE ANOTHER, THE OUTER END OF EACH DOOR SEALING WITH THE RESPECTIVE OUTER POST AND THE INNER END OF EACH DOOR SEALING WITH THE OTHER, THE INNER DOOR SLIDING PAST THE OUTER DOOR TO PERMIT APPROXIMATELY ONE-HALF OF THE CAR SIDE TO BE EXPOSED.
Inventors
- 👤 Ray L Ferris
- 👤 William R Shaver
- 👤 Jan W Dohne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:14
CPC Classifications
B; B61; B61D; B61D19/00; B61D19/003; B61D19/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |