Patent US2456129A successfully refreshed from Google Patents.
Patent US2433175A successfully refreshed from Google Patents.
US2433175A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractory lining
Assignee: Ferro Engineering Co
•
Filing: 1943-01-08
•
Granted: 1947-12-23
•
Expires: 1963-01-08
Abstract
No abstract record available.
Inventors
- 👤 Walter W Urmetz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:08
CPC Classifications
B; B22; B22C; B22C21/00; B22D; B22D7/00; B22D7/06; B22D7/10
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US466742A
Cited
US477746A
Cited
US530424A
Cited
GB190304905A
Cited
GB190502556A
Cited
US1341977A
Cited
US1454859A
Cited
US1689175A
Cited
US1969726A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-12-22 | 1951-06-23 | 1951-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-12-22 | 1955-06-23 | 1955-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-12-22 | 1959-06-23 | 1959-12-23 | $7700.00 | Window Closed / Lapsed |