US3148950A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of treating metal sulfates
Assignee: Fort James Corp
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Filing: 1961-02-27
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Granted: 1964-09-15
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Expires: 1981-02-27
Abstract
No abstract record available.
Inventors
- 👤 Jarrell B Mugg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:04
CPC Classifications
C; C01; C01F; C01F11/00; C01F11/02; C01F11/08; C01B; C01B17/00; C01B17/02; C01B17/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A PROCESS OF PRODUCING ELEMENTAL SULFUR FROM A METAL SULFATE WHICH COMPRISES PREPARING A FINELY DIVIDED MIXTURE OF SAID SULFATE AND CARBON, WHEREIN THE MOLAR RATIO OF CARBON TO SULFUR IN SAID MIXTURE IS AT LEAST 2:1, RESPECTIVELY, PASSING THROUGH THE RESULTING MIXTURE IN A REACTION ZONE A HOT CARBON DIXOIDE-CONTAINING GAS AT AN ELEVATED TEMPERATURE AND AT A RATE SUFFICIENT TO INSURE AN INTIMATE CONTACT BETWEEN THE CARBON DIOXIDE AND SAID MIXTURE TO REACT WITH AND CONVERT SUBSTANTIALLY ALL OF SAID SULFATE TO ELEMENTAL SULFUR AND A COMPOUND SELECTED FROM THE GROUP CONSISTING OF CORRESPONDING METAL OXIDES AND CARBONATES, AND SEPARATING SAID ELEMENTAL SULFUR FROM SAID COMPOUND.
Claim 2
Dependent Claim
108 words
A PROCESS OF PRODUCING ELEMENTAL SULFUR FROM A METAL SULFATE WHICH COMPRISES PREPARING A FINELY DIVIDED MIXTURE OF SAID SULFATE AND CARBON, WHEREIN THE MOLAR RATIO OF CARBON TO SULFUR IN SAID MIXTURE IS AT LEAST 2:1, RESPECTIVELY, PASSING THROUGH THE RESULTING MIXTURE IN A REACTION ZONE A HOT CARBON DIXOIDE-CONTAINING GAS AT AN ELEVATED TEMPERATURE AND AT A RATE SUFFICIENT TO INSURE AN INTIMATE CONTACT BETWEEN THE CARBON DIOXIDE AND SAID MIXTURE TO REACT WITH AND CONVERT SUBSTANTIALLY ALL OF SAID SULFATE TO ELEMENTAL SULFUR AND A COMPOUND SELECTED FROM THE GROUP CONSISTING OF CORRESPONDING METAL OXIDES AND CARBONATES, AND SEPARATING SAID ELEMENTAL SULFUR FROM SAID COMPOUND.
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) | 1967-09-15 | 1968-03-16 | 1968-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-15 | 1972-03-16 | 1972-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-15 | 1976-03-16 | 1976-09-15 | $7700.00 | Window Closed / Lapsed |