Patent US2911804A successfully refreshed from Google Patents.
US2911804A
Expired / Lapsed
US
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Rolling mill coupling
Assignee: United Engineering and Foundry Co
•
Filing: 1956-04-12
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Granted: 1959-11-10
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Expires: 1976-04-12
Abstract
No abstract record available.
Inventors
- 👤 Jeremiah W O'brien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:32
CPC Classifications
B; B21; B21B; B21B35/00; B21B35/14; B21B35/148
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1496463A
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US1041772A
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US1261548A
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GB215941A
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US1908307A
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US1985405A
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US1950573A
Cited
US2577508A
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US2618941A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-09 | 1963-05-11 | 1963-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-09 | 1967-05-11 | 1967-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-09 | 1971-05-11 | 1971-11-10 | $7700.00 | Window Closed / Lapsed |