US3119732A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treating cellulosic fibers with a cationic protein dispersion
Assignee: Sonoco Products Co
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Filing: 1961-05-01
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Granted: 1964-01-28
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Expires: 1981-05-01
Abstract
No abstract record available.
Inventors
- 👤 Julius D Robertson
- 👤 Charles N Betts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:14
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/21; D21H17/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
IN A METHOD OF TREATING CELLULOSIC FIBERS COMPRISING THE STEPS OF, PREPARING AN ANIONIC AQUEOUS SUSPENSION OF CELLULOSIC FIBERS, COLLOIDALLY DISPERSING AN AMPHOTERIC PROTEIN IN AN ACID SOLUTION TO PRODUCE A CATIONIC PROTEIN DISPERSION, MIXING SAID CATIONIC PROTEIN DISPERSION WITH SAID CELLULOSIC FIBERS WITH THE AMOUNT OF SAID PROTEIN SUBSTANTIALLY LESS IN PROPORTION TO THE CELLULOSIC FIBERS BY WEIGHT THE IMPROVEMENT OF, ADJUSTING THE PH OF THE PROTEIN-FIBER MIXTURE TO SUBSTANTIALLY THE ISO-ELECTRIC POINT OF THE PROTEIN TO COMPLETE THE PERCIPITATION OF THE PROTEIN
Claim 2
Dependent Claim
84 words
IN A METHOD OF TREATING CELLULOSIC FIBERS COMPRISING THE STEPS OF, PREPARING AN ANIONIC AQUEOUS SUSPENSION OF CELLULOSIC FIBERS, COLLOIDALLY DISPERSING AN AMPHOTERIC PROTEIN IN AN ACID SOLUTION TO PRODUCE A CATIONIC PROTEIN DISPERSION, MIXING SAID CATIONIC PROTEIN DISPERSION WITH SAID CELLULOSIC FIBERS WITH THE AMOUNT OF SAID PROTEIN SUBSTANTIALLY LESS IN PROPORTION TO THE CELLULOSIC FIBERS BY WEIGHT THE IMPROVEMENT OF, ADJUSTING THE PH OF THE PROTEIN-FIBER MIXTURE TO SUBSTANTIALLY THE ISO-ELECTRIC POINT OF THE PROTEIN TO COMPLETE THE PERCIPITATION OF THE PROTEIN
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) | 1967-01-27 | 1967-07-29 | 1968-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-01-27 | 1971-07-29 | 1972-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-01-27 | 1975-07-29 | 1976-01-28 | $7700.00 | Window Closed / Lapsed |