Patent US3491571A successfully refreshed from Google Patents.
US3491571A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rolling mill method and apparatus
Assignee: United Engineering and Foundry Co
•
Filing: 1967-01-25
•
Granted: 1970-01-27
•
Expires: 1987-01-25
Abstract
No abstract record available.
Inventors
- 👤 Jeremiah Wagner O'brien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:35
CPC Classifications
B; B21; B21B; B21B31/00; B21B31/02; B21B31/028; B21B13/00; B21B13/005; B21B31/16; B21B31/20; B21B31/22; B21B31/30
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1973-01-26 | 1973-07-28 | 1974-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-26 | 1977-07-28 | 1978-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-26 | 1981-07-28 | 1982-01-27 | $7700.00 | Window Closed / Lapsed |