Patent US3030897A successfully refreshed from Google Patents.
US3030897A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Railway car end passages
Assignee: Individual
•
Filing: 1954-05-12
•
Granted: 1962-04-24
•
Expires: 1974-05-12
Abstract
No abstract record available.
Inventors
- 👤 Leonard D Barry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:13
CPC Classifications
B; B61; B61D; B61D17/00; B61D17/04; B61D17/20
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1114552A
Cited
US434755A
Cited
US443075A
Cited
US461927A
Cited
US474966A
Cited
US526803A
Cited
US566712A
Cited
US417567A
Cited
US835114A
Cited
US851945A
Cited
US1168335A
Cited
US1110394A
Cited
US2081964A
Cited
US2184298A
Cited
US2132327A
Cited
US2234059A
Cited
US2229047A
Cited
US2251584A
Cited
US2407007A
Cited
GB689147A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-23 | 1965-10-23 | 1966-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-23 | 1969-10-23 | 1970-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-23 | 1973-10-23 | 1974-04-24 | $7700.00 | Window Closed / Lapsed |