US3793439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of chlorine dioxide
Assignee: Erco Industries Ltd
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Filing: 1971-02-17
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Granted: 1974-02-19
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Expires: 1991-02-17
Abstract
Abstract AN ALKALI METAL CHLORATE IS REDUCED IN AN ACID MEDIUM IN A MULTIPLICTY OF REACTION ZONES AT LEAST ONE OF WHICH OPERATES TO EVAPORATE WATER FROM THE REACTION MEDIUM TO PRODUCE CHLORINE DIOXIDE THE STREAM IS USED TO PROVIDE AT LEAST PART OF THE HEAT REQUIREMENT OF AT LEAST ONE FURTHER ZONE. IN THIS WAY THERMAL ECONOMY IS EFFECTED.
Inventors
- 👤 W Rapson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:37
CPC Classifications
C; C01; C01B; C01B11/00; C01B11/02; C01B11/022; C01B11/023; C01B11/025
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 |