Patent US2603423A successfully refreshed from Google Patents.
US2603423A
Expired / Lapsed
US
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Method for the removal of sulfur from sponge iron
Assignee: Individual
•
Filing: 1947-01-06
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Granted: 1952-07-15
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Expires: 1967-01-06
Abstract
No abstract record available.
Inventors
- 👤 Russell C Buehl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:28
CPC Classifications
C; C21; C21D; C21D3/00; C21D3/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
THE METHOD OF PRODUCING LOW SULFUR CONTENT SPONGE IRON WHICH COMPRISES TREATING THE IRON ORE AT A TEMPERATURE BELOW THE MELTING POINT OF THE CONSTITUENTS OF SAID ORE IN THE PRESENCE OF A SOLID CARBONACEOUS MATERIAL AS THE REDUCING AGENT AND A DESULFURIZING AGENT SELECTED FROM THE GROUP CONSISTING OF DOLOMITE, LIME AND LIMESTONE TO PRODUCE SPONGE IRON PARTICLES HAING A CLOSELY ADHERNG, BRITTLE SURFACE COATING OF HIGH SULFUR CONTENT BASIC SLAG, THEN ABRADING THE SURFACES OF THE SO PRODUCED SPONGE IRON PARTICLES TO REMOVE THE BRITTLE SURFACE LAYER, AND THEN SEPARATING FROM THE ABRADED SPONGE IRON PARTICLES THE FINES OF HIGH SLFUR CONTENT SLAG WHICH HAVE BEEN BROKEN FROM THE SURFACE OF SAID PARTICLES.
Claim 2
Independent Claim
115 words
THE METHOD OF PRODUCING LOW SULFUR CONTENT SPONGE IRON WHICH COMPRISES TREATING THE IRON ORE AT A TEMPERATURE BELOW THE MELTING POINT OF THE CONSTITUENTS OF SAID ORE IN THE PRESENCE OF A SOLID CARBONACEOUS MATERIAL AS THE REDUCING AGENT AND A DESULFURIZING AGENT SELECTED FROM THE GROUP CONSISTING OF DOLOMITE, LIME AND LIMESTONE TO PRODUCE SPONGE IRON PARTICLES HAING A CLOSELY ADHERNG, BRITTLE SURFACE COATING OF HIGH SULFUR CONTENT BASIC SLAG, THEN ABRADING THE SURFACES OF THE SO PRODUCED SPONGE IRON PARTICLES TO REMOVE THE BRITTLE SURFACE LAYER, AND THEN SEPARATING FROM THE ABRADED SPONGE IRON PARTICLES THE FINES OF HIGH SLFUR CONTENT SLAG WHICH HAVE BEEN BROKEN FROM THE SURFACE OF SAID PARTICLES.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-15 | 1956-01-14 | 1956-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-15 | 1960-01-14 | 1960-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-15 | 1964-01-14 | 1964-07-15 | $7700.00 | Window Closed / Lapsed |