US3375688A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for rolling metal strip and sheet
Assignee: Youngstown Res and Dev Co
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Filing: 1965-05-19
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Granted: 1968-04-02
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Expires: 1985-05-19
Abstract
No abstract record available.
Inventors
- 👤 Louis H Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:28
CPC Classifications
E; E21; E21D; E21D23/00; E21D23/04; E21D23/0472; B; B21; B21B; B21B37/00; B21B37/28; B21B37/46
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) | 1971-04-02 | 1971-10-02 | 1972-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-02 | 1975-10-02 | 1976-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-02 | 1979-10-02 | 1980-04-02 | $7700.00 | Window Closed / Lapsed |