US3793444A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multistage iron chloride oxidation process
Assignee: EIDP Inc
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Filing: 1972-02-09
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Granted: 1974-02-19
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Expires: 1992-02-09
Abstract
Abstract A PROCESS IS PROVIDED FOR THE OXIDATION OF AN IRON CHLORIDE WHEREIN VAPORS OF THE CHLORIDE AND AN OXYGENCONTAINING GAS ARE CAUSED TO PASS UPWARDLY THROUGH A VERTICAL REACTION AREA PROVIDED WITH A SERIES OF COMMUNICATING REACTION ZONE, EACH SEPARATED FROM THE NEXT ADJACENT ONE BY A FORAMINOUS MEMBER. THERE IS MAINTAINED UPWARD WITH THE FLOW GASES A FLOW OF INERT SOLID PARTICLES THROUGH AND OUT OF THE REACTION AREA IN AN AMOUNT AT LEAST EQUAL TO THE GAS FLOW RATE ON A WEIGHT BASIS. HIGH CONVERSIONS OF THE IRON CHLORIDE CAN BE ATTAINED IN THIS MANNER WITHOUT THE UNWANTED BUILD-UP OF IRON OXIDE SCALE ON THE REACTOR WALLS OR ASSOCIATED PARTS.
Inventors
- 👤 J Reeves
- 👤 D Wells
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:12
CPC Classifications
C; C01; C01B; C01B7/00; C01B7/01; C01B7/03; C01G; C01G49/00; C01G49/02; C01G49/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-18 | 1977-08-20 | 1978-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-18 | 1981-08-20 | 1982-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-18 | 1985-08-20 | 1986-02-19 | $7700.00 | Window Closed / Lapsed |