US3485183A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Railway hopper gate flexible operating assembly with resilient gate sealing means
Assignee: Midland Ross Corp
•
Filing: 1967-04-17
•
Granted: 1969-12-23
•
Expires: 1987-04-17
Abstract
No abstract record available.
Inventors
- 👤 Walter L Floehr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:57
CPC Classifications
B; B61; B61D; B61D7/00; B61D7/14; B61D7/16; B61D7/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US396140A
Cited
US887225A
Cited
US1122918A
Cited
US2094979A
Cited
US2250524A
Cited
US2859707A
Cited
US3075477A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-22 | 1973-06-23 | 1973-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-22 | 1977-06-23 | 1977-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-22 | 1981-06-23 | 1981-12-23 | $7700.00 | Window Closed / Lapsed |