Patent US3798119A successfully refreshed from Google Patents.
US3798119A
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Process for bleaching kraft pulp with oxygen in the presence of white liquor from a kraft recovery system
Assignee: Kimberly Clark Tissue Co
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Filing: 1972-04-24
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Granted: 1974-03-19
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Expires: 1992-04-24
Abstract
Abstract AN IMPROVED METHOD OF BLEACHING KRAFT PULP IN AN OXYGEN-BASED BLEACHING PROCESS IS DISCLOSED IN WHICH (A) WHITE LIQUOR FROM A KRAFT RECOVERY SYSTEM IS EMPLOYED AS A SOURCE OF ALKALI IN THE OXYGEN-BASED BLEACHING PROCESS WITHOUT ANY PRETREATMENT OF THE WHITE LIQUOR TO REMOVE SODIUM SULFIDE AND (B) THE EFFLUENT FROM THE OXYGENBASED BLEACHING PROCESS IS RECYCLED DIRECTLY TO THE KRAFT RECOVERY SYSTEM.
Inventors
- 👤 R Singh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:54
CPC Classifications
D; D21; D21C; D21C11/00; D21C11/0021; D21C11/0028; D21C9/00; D21C9/10; D21C9/1026; Y; Y02; Y02P; Y02P40/00; Y02P40/40
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) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |