US3754081A
Expired / Lapsed
US
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Process for the production of chlorine dioxide,chlorine and a mixtureof an alkali metal sulfate and bisulfate
Assignee: Hooker Chemical Corp
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Filing: 1970-09-17
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Granted: 1973-08-21
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Expires: 1990-09-17
Abstract
Abstract IN AQUEOUS SOLUTION BY CONTROLLING THE ACID NORMALITY OF THE AQUEOUS SOLUTION BETWEEN ABOUT 4 TO ABOUT 6 NORMAL. CHLORINE DIOXIDE, CHLORINE AND A MIXTURE OF AN ALKALI METAL SULFATE AND A BISUFLATE FOR USE IN SUPPLYING SODIUM AND SULFUR VALUES TO A COOKING LIQUOR EMPLOYED IN THE KRAFT PROCESS FOR DELIGNIFYING WOOD TO PRODUCE A PLUP SUITABLE FOR BLEACHING IS PRODUCED BY THE REACTION OF AN ALKALI METAL CHORATE, AN ALKALI METAL CHORIDE AND SULFURIC ACID
Inventors
- 👤 Vere Partridge H De
- 👤 B Schoepfle
- 👤 A Schulz
- 👤 H Rosen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:55
CPC Classifications
D; D21; D21C; D21C9/00; D21C9/10; D21C9/12; D21C9/14; C; C01; C01B; C01B11/00; C01B11/02; C01B11/022; C01B11/023; C01B11/025; C01B7/00; C01B7/01; C01B7/03; C01D; C01D5/00; C01D5/02; D21C3/00; D21C3/02; D21C3/022
Claims Analysis
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References Cited (Backward Citations)
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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) | 1976-08-20 | 1977-02-19 | 1977-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-20 | 1981-02-19 | 1981-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-20 | 1985-02-19 | 1985-08-21 | $7700.00 | Window Closed / Lapsed |