US2585404A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for introducing solid materials into molten metals
Assignee: United States Steel Corp
•
Filing: 1950-03-06
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Granted: 1952-02-12
•
Expires: 1970-03-06
Abstract
No abstract record available.
Inventors
- 👤 Earl W Pierce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:45
CPC Classifications
C; C21; C21C; C21C7/00; C21C7/04; C21C7/06; Y; Y10; Y10T; Y10T292/00; Y10T292/23
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US563769A
Cited
US1348457A
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US1443920A
Cited
US1559342A
Cited
GB317493A
Cited
US1750390A
Cited
US1949051A
Cited
US1950612A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-11 | 1955-08-13 | 1956-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-11 | 1959-08-13 | 1960-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-11 | 1963-08-13 | 1964-02-12 | $7700.00 | Window Closed / Lapsed |