Patent US3377235A successfully refreshed from Google Patents.
US3377235A
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US
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Process for bleaching multi-colored broke with hypochlorites
Assignee: Kimberly Clark Tissue Co
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Filing: 1964-12-03
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Granted: 1968-04-09
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Expires: 1984-12-03
Abstract
No abstract record available.
Inventors
- 👤 George R Webster
- 👤 Norman S Lea
- 👤 Edmund S Oshetsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:32
CPC Classifications
D; D21; D21C; D21C5/00; D21C5/02; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/64
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
A PROCESS FOR BLEACHING MULTI-COLORED BROKE WHICH COMPRISES THE STEPS OF: BLEACHING AN AQUEOUS SUSPENSION OF SUBSTANTIALLY UNBLEACHED MULTI-COLORED BROKE BY A FIRST HYPOCHLORITE BLEACH WITH A HYPOCHLORITE BLEACH LIQUOR AT A PH IN THE RANGE BETWEEN ABOUT 6.0 AND 6.5, ADJUSTING THE FIRST BLEACH STEP LIQUOR TO A PH IN THE RANGE BETWEEN ABOUT 9.0 AND 9.5, RETAINING SAID LIQUOR IN COMBINATION WITH SAID PULP THROUGHOUT THE PROCESS SO AS NOT TO SUBSTANTIALLY SEPARATE COLOR BODIES FROM SAID LIQUOR, AND EFFECTING A SECOND HYPOCHLORITE BLEACH OF SAID BROKE AT A PH IN THE LATTER RANGE.
Claim 2
Dependent Claim
96 words
A PROCESS FOR BLEACHING MULTI-COLORED BROKE WHICH COMPRISES THE STEPS OF: BLEACHING AN AQUEOUS SUSPENSION OF SUBSTANTIALLY UNBLEACHED MULTI-COLORED BROKE BY A FIRST HYPOCHLORITE BLEACH WITH A HYPOCHLORITE BLEACH LIQUOR AT A PH IN THE RANGE BETWEEN ABOUT 6.0 AND 6.5, ADJUSTING THE FIRST BLEACH STEP LIQUOR TO A PH IN THE RANGE BETWEEN ABOUT 9.0 AND 9.5, RETAINING SAID LIQUOR IN COMBINATION WITH SAID PULP THROUGHOUT THE PROCESS SO AS NOT TO SUBSTANTIALLY SEPARATE COLOR BODIES FROM SAID LIQUOR, AND EFFECTING A SECOND HYPOCHLORITE BLEACH OF SAID BROKE AT A PH IN THE LATTER RANGE.
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) | 1971-04-09 | 1971-10-09 | 1972-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-09 | 1975-10-09 | 1976-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-09 | 1979-10-09 | 1980-04-09 | $7700.00 | Window Closed / Lapsed |