Patent US2863755A successfully refreshed from Google Patents.
US2863755A
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Oil-treated calcium carbide for desulfurization of iron
Assignee: Union Carbide Corp
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Filing: 1957-04-22
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Granted: 1958-12-09
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Expires: 1977-04-22
Abstract
No abstract record available.
Inventors
- 👤 Edward F Kurzinski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:47
CPC Classifications
C; C21; C21C; C21C1/00; C21C1/02; C21C1/025
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
55 words
IN THE TREATMENT OF A SULFUR-CONTAINING FERROUS MELT WHEREIN FINELY DIVIDED CALCIUM CARBIDE IS INTRODUCED INTO SAID MELT AS A DESULFURIZING AGENT, THE IMPROVEMENT OF INCREASING THE REACTIVE SURFACE AREA OF SAID CALCIUM CARBIDE, SAID IMPROVEMENT COMPRISING DISINTEGRATING THE FINELY DIVIDED CALCIUM CARBIDE IN THE MELT OF OIL TREATING SAID CALCIUM PRIOR TO ITS INTRODUCTION.
References Cited (Backward Citations)
US1836196A
Cited
US2577764A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-08 | 1962-06-09 | 1962-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-08 | 1966-06-09 | 1966-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-08 | 1970-06-09 | 1970-12-09 | $7700.00 | Window Closed / Lapsed |