US2587573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Desulfurizing process
Assignee: Essex Research Corp
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Filing: 1949-06-09
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Granted: 1952-02-26
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Expires: 1969-06-09
Abstract
No abstract record available.
Inventors
- 👤 Dominic J Wynne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:36
CPC Classifications
C; C21; C21C; C21C1/00; C21C1/02; Y; Y02; Y02P; Y02P10/00; Y02P10/10; Y02P10/122
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
167 words
THE PROCESS OF DESULPHURIZING PIG IRON, WHICH COMPRISES MAINTAINING A BATH OF MOLTEN PIG IRON IN A DESULPHURIZING VESSEL IN CONTACT WITH A CALCIUM DESULPHURIZING AGENT CAPABLE OF REACTING WITH SULPHUR IN THE MOLTEN PIG TO FORM CALCIUM SULPHIDE, ENCLOSING THE MOLTEN PIG IRON AND DESULPHURIZING AGENT TO EXCLUDE OXIDIZING GASES INCLUDING THE ATMOSPHERE AND MAINTAIN STRONG REDUCING CONDITIONS AROUNG THE MOLTEN PIG IRON AND THE DISULPHURIZING AGENT, BLOWING THROUGH AT LEAST A TWO FOOT DEPTH OF MOLTEN PIG IRON AN INERT GAS WHICH IS FREE FROM CARBON MONOXIDE AN EXCESS OF 33 PERCENT BY VOLUME, NOT COMBUSTIBLE IN THE AIR AND IS FREE FROM SUBSTANTIAL QUANTITIES OF COMPOUND WHICH, UNDER THE CONDITIONS, ARE MORE OXIDIZING THAN CARBON MONOXIDE WHILE MAINTAINING A PRESSURE OF AT LEAST ATMOSPHERIC IN THE VESSEL, LEADING THE INERT GAS AFTER IT HAS PASSED THROUGH THE VESSEL OUT OF THE ENCLOSED SPACE AND CONTINUING THE BLOWING WITH THE INERT GAS BEYOND THE POINT AT WHICH THE EFFLUENT GAS IS COMBUSTIBLE IN THE ATMOSPHERE.
Claim 2
Dependent Claim
167 words
THE PROCESS OF DESULPHURIZING PIG IRON, WHICH COMPRISES MAINTAINING A BATH OF MOLTEN PIG IRON IN A DESULPHURIZING VESSEL IN CONTACT WITH A CALCIUM DESULPHURIZING AGENT CAPABLE OF REACTING WITH SULPHUR IN THE MOLTEN PIG TO FORM CALCIUM SULPHIDE, ENCLOSING THE MOLTEN PIG IRON AND DESULPHURIZING AGENT TO EXCLUDE OXIDIZING GASES INCLUDING THE ATMOSPHERE AND MAINTAIN STRONG REDUCING CONDITIONS AROUNG THE MOLTEN PIG IRON AND THE DISULPHURIZING AGENT, BLOWING THROUGH AT LEAST A TWO FOOT DEPTH OF MOLTEN PIG IRON AN INERT GAS WHICH IS FREE FROM CARBON MONOXIDE AN EXCESS OF 33 PERCENT BY VOLUME, NOT COMBUSTIBLE IN THE AIR AND IS FREE FROM SUBSTANTIAL QUANTITIES OF COMPOUND WHICH, UNDER THE CONDITIONS, ARE MORE OXIDIZING THAN CARBON MONOXIDE WHILE MAINTAINING A PRESSURE OF AT LEAST ATMOSPHERIC IN THE VESSEL, LEADING THE INERT GAS AFTER IT HAS PASSED THROUGH THE VESSEL OUT OF THE ENCLOSED SPACE AND CONTINUING THE BLOWING WITH THE INERT GAS BEYOND THE POINT AT WHICH THE EFFLUENT GAS IS COMBUSTIBLE IN THE ATMOSPHERE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-25 | 1955-08-27 | 1956-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-25 | 1959-08-27 | 1960-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-25 | 1963-08-27 | 1964-02-26 | $7700.00 | Window Closed / Lapsed |