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 21:16
CPC Classifications
B; B61; B61D; B61D15/00; B61D15/06; B61G; B61G7/00; B61G7/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US881075A
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US1020445A
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US1412737A
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US1497329A
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US1414207A
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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 |