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US2669892A
Expired / Lapsed
US
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Rolling mill
Assignee: Siemens Industry Inc
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Filing: 1949-11-05
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Granted: 1954-02-23
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Expires: 1969-11-05
Abstract
No abstract record available.
Inventors
- 👤 Joseph M O'malley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 07:11
CPC Classifications
B; B21; B21B; B21B31/00; B21B31/16; B21B31/20; B21B31/22; B21B31/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-22 | 1957-08-24 | 1958-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-22 | 1961-08-24 | 1962-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-22 | 1965-08-24 | 1966-02-23 | $7700.00 | Window Closed / Lapsed |