US3552799A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sparger type unloading apparatus for railroad cars
Assignee: North American Car Corp
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Filing: 1969-07-18
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Granted: 1971-01-05
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Expires: 1989-07-18
Abstract
Abstract METHOD AND APPARATUS FOR UNLOADING DRY BULK COMMODITY FROM THE BODY OF A RAILROAD CAR BY DISCHARGING LIQUID IN THE FORM OF STREAMS IN UPWARD AND LATERAL DIRECTIONS, INTO DIRECT CONTACT WITH THE COMMODITY FOR CREATING A SLURRY OF ALL OF THE COMMODITY IN THE BODY FOR EXPEDITIOUS REMOVAL OF THE COMMODITY FROM THE BODY OF THE CAR.
Inventors
- 👤 Clarence J Koranda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:07
CPC Classifications
B; B61; B61D; B61D5/00; B61D5/002
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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |