US2959992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Master control device for rolling mills and the like
Assignee: Granite City Steel Co
•
Filing: 1956-10-03
•
Granted: 1960-11-15
•
Expires: 1976-10-03
Abstract
No abstract record available.
Inventors
- 👤 Clarence R Mitchell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:09
CPC Classifications
B; B21; B21B; B21B37/00; B21B37/58; B21B37/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1466642A
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US1764312A
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US2017040A
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US2106965A
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US2124518A
Cited
US2564284A
Cited
US2708254A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-15 | 1964-05-16 | 1964-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-15 | 1968-05-16 | 1968-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-15 | 1972-05-16 | 1972-11-15 | $7700.00 | Window Closed / Lapsed |