Patent US2825473A successfully refreshed from Google Patents.
US2825473A
Expired / Lapsed
US
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Car coupler
Assignee: National Malleable and Steel Castings Co
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Filing: 1954-05-13
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Granted: 1958-03-04
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Expires: 1974-05-13
Abstract
No abstract record available.
Inventors
- 👤 William J Metzger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:39
CPC Classifications
B; B61; B61G; B61G3/00; B61G3/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1891660A
Cited
US1989894A
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US2040968A
Cited
US2246406A
Cited
US2533940A
Cited
US2562203A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-03 | 1961-09-02 | 1962-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-03 | 1965-09-02 | 1966-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-03 | 1969-09-02 | 1970-03-04 | $7700.00 | Window Closed / Lapsed |