Patent US1771241A successfully refreshed from Google Patents.
US1771241A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot-metal mixer
Assignee: PENNSYLVANIA ENGINEERING WORKS
•
Filing: 1929-08-08
•
Granted: 1930-07-22
•
Expires: 1949-08-08
Abstract
No abstract record available.
Inventors
- 👤 Lee E Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:09
CPC Classifications
C; C21; C21C; C21C1/00; C21C1/06
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1933-07-21 | 1934-01-20 | 1934-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1937-07-21 | 1938-01-20 | 1938-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1941-07-21 | 1942-01-20 | 1942-07-22 | $7700.00 | Window Closed / Lapsed |