US2940890A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of cellulosic pulps
Assignee: Kimberly Clark Corp
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Filing: 1956-06-25
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Granted: 1960-06-14
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Expires: 1976-06-25
Abstract
No abstract record available.
Inventors
- 👤 Ralph V Braun
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:07
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/03; D21H17/05; D21H17/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
A PROCESS FOR UTILIZING WOOD PULP SELECTED FROM THE GROUP CONSISTING OF KRAFT PULP, WEST COAST SULPHITE PULP AND MIXTURES THEREOF IN THE MANUFACTURE OF A SOFT, PLIABLE, DRY CREPED CELLULOSIC TISSUE PRODUCT WHICH CONSISTS IN THE STEPS OF DISPERSING SAID PULP IN WATER, INTRO DUCING A SMALL AMOUNT OF SELECTED FATTY ACID INTO THE PULP DISPERSION, SAID AMOUNT OF FATTY ACID BEING BETWEEN ABOUT 0.1 AND 0.75 PERCENT BY WEIGHT OF THE OVEN DRY PULP, SAID FATTY ACID HAVING NOT MORE THAN ONE UNSATURATED BOND AND FROM 16 TO 18 CARBON ATOMS, MAINTAINING THE PULP DISPERSION AT A PH OF LESS THAN ABOUT 6.5 WITH A MINERAL ACID, FORMING A CONTINUOUS WEB FROM SAID DISPERSION, DRYING SAID WEB ON A YANKEE DRYER, AND CONTINUOUSLY CREPING SAID WEB FROM SAID DRYER.
Claim 2
Dependent Claim
131 words
A PROCESS FOR UTILIZING WOOD PULP SELECTED FROM THE GROUP CONSISTING OF KRAFT PULP, WEST COAST SULPHITE PULP AND MIXTURES THEREOF IN THE MANUFACTURE OF A SOFT, PLIABLE, DRY CREPED CELLULOSIC TISSUE PRODUCT WHICH CONSISTS IN THE STEPS OF DISPERSING SAID PULP IN WATER, INTRO DUCING A SMALL AMOUNT OF SELECTED FATTY ACID INTO THE PULP DISPERSION, SAID AMOUNT OF FATTY ACID BEING BETWEEN ABOUT 0.1 AND 0.75 PERCENT BY WEIGHT OF THE OVEN DRY PULP, SAID FATTY ACID HAVING NOT MORE THAN ONE UNSATURATED BOND AND FROM 16 TO 18 CARBON ATOMS, MAINTAINING THE PULP DISPERSION AT A PH OF LESS THAN ABOUT 6.5 WITH A MINERAL ACID, FORMING A CONTINUOUS WEB FROM SAID DISPERSION, DRYING SAID WEB ON A YANKEE DRYER, AND CONTINUOUSLY CREPING SAID WEB FROM SAID DRYER.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-14 | 1963-12-14 | 1964-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-14 | 1967-12-14 | 1968-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-14 | 1971-12-14 | 1972-06-14 | $7700.00 | Window Closed / Lapsed |