US2459256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Desulfurizing molten ferrous metal
Assignee: AM Byers Co
•
Filing: 1947-01-11
•
Granted: 1949-01-18
•
Expires: 1967-01-11
Abstract
No abstract record available.
Inventors
- 👤 Frederick W White
- 👤 Edward B Story
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:00
CPC Classifications
C; C21; C21C; C21C7/00; C21C7/04; C21C7/064
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1532072A
Cited
US1590739A
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US1646728A
Cited
US2015692A
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US2110066A
Cited
GB481878A
Cited
US2204813A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-01-18 | 1952-07-19 | 1953-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-01-18 | 1956-07-19 | 1957-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-01-18 | 1960-07-19 | 1961-01-18 | $7700.00 | Window Closed / Lapsed |