US2802580A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Car couplers
Assignee: Ohio Brass Co
•
Filing: 1953-01-16
•
Granted: 1957-08-13
•
Expires: 1973-01-16
Abstract
No abstract record available.
Inventors
- 👤 Madonna L Larson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:37
CPC Classifications
B; B61; B61D; B61D15/00; B61D15/06; B61G; B61G7/00; B61G7/14
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US881075A
Cited
US1020445A
Cited
US1412737A
Cited
US1497329A
Cited
US1414207A
Cited
US1546710A
Cited
GB316351A
Cited
US2113542A
Cited
US2256493A
Cited
US2250425A
Cited
US2463366A
Cited
US2602553A
Cited
US2665128A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-12 | 1961-02-11 | 1961-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-12 | 1965-02-11 | 1965-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-12 | 1969-02-11 | 1969-08-13 | $7700.00 | Window Closed / Lapsed |