Patent US2535898A successfully refreshed from Google Patents.
US2535898A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for changing vertical mill rolls
Assignee: Carnegie Illinois Steel Corp
•
Filing: 1944-10-10
•
Granted: 1950-12-26
•
Expires: 1964-10-10
Abstract
No abstract record available.
Inventors
- 👤 Raymond A Burkhart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:37
CPC Classifications
B; B21; B21B; B21B31/00; B21B31/08; B21B31/10; B21B31/12
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US385058A
Cited
DE471155C
Cited
US1543649A
Cited
US1558614A
Cited
US1618700A
Cited
US2010820A
Cited
US2049842A
Cited
US2396614A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-25 | 1954-06-26 | 1954-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-25 | 1958-06-26 | 1958-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-25 | 1962-06-26 | 1962-12-26 | $7700.00 | Window Closed / Lapsed |