US3408117A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Railroad car hopper discharge apparatus
Assignee: ExxonMobil Oil Corp
•
Filing: 1967-10-17
•
Granted: 1968-10-29
•
Expires: 1987-10-17
Abstract
No abstract record available.
Inventors
- 👤 Clarence J Koranda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:39
CPC Classifications
B; B61; B61D; B61D5/00; B61D5/002; B61D5/004; B61D7/00; B61D7/14; B61D7/32
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2950143A
Cited
US2950144A
Cited
US3162490A
Cited
US3136584A
Cited
US3220778A
Cited
US3258173A
Cited
US3194420A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-29 | 1972-04-29 | 1972-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-29 | 1976-04-29 | 1976-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-29 | 1980-04-29 | 1980-10-29 | $7700.00 | Window Closed / Lapsed |