Patent US2656575A successfully refreshed from Google Patents.
US2656575A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Core blowing apparatus
Assignee: FED FOUNDRY SUPPLY Co
•
Filing: 1950-03-25
•
Granted: 1953-10-27
•
Expires: 1970-03-25
Abstract
No abstract record available.
Inventors
- 👤 Heinrich J B Herbruggen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:45
CPC Classifications
B; B22; B22C; B22C15/00; B22C15/23; B22C15/24; B22C13/00; B22C13/12
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2191451A
Cited
US819883A
Cited
US1030226A
Cited
US1563156A
Cited
US2409330A
Cited
GB601714A
Cited
US2468672A
Cited
US2490559A
Cited
US2563643A
Cited
US2556618A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-26 | 1957-04-27 | 1957-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-26 | 1961-04-27 | 1961-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-26 | 1965-04-27 | 1965-10-27 | $7700.00 | Window Closed / Lapsed |