US3842062A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-soluble complexes of protein and anionic polyelectrolytes such as sodium carboxymethyl cellulose
Assignee: EIDP Inc
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Filing: 1972-09-27
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Granted: 1974-10-15
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Expires: 1992-09-27
Abstract
Abstract 1. A METHOD OR PREPARING A WATER-SOLUBLE, ESSENTIALLY CHEMICALLY NEUTRAL COMPLEX WHICH COMPRISES NEUTRALIZING A WATER-SOLUBLE COMPLEX, FORMED BY REACTING (1) PROTEIN WHICH IS AT LEAST DISPERSIBLE IN WATER WITH (2) SODIUM CARBOXYMETHYLCELLULOSE, THE WEIGHT RATIO OF PROTEIN TO SODIUM CARBOXYMETHYCELLULOSE BEING 2:1 TO 8:1, IN AN ACIDIC AQUEOUS MEDIUM AT A PH BELOW THE ISOELECTRIC POINT OF THE PROTEIN, BY REACTING SAID WATER-INSOLUBLE COMPLEX WITH A WATER-SOLUBLE HYDROXIDE IN A SOLVENT/WATER MEDIUM CONTAINING 55 TTO 99% BY WEIGHT OF WATER=MISCIBLE ORGANIC SOLVENT AND 1 TO 45% BY WEIGHT OF WATER, AND RECOVERING THE RESULTING WATER-SOLUBLE COMPLEX.
Inventors
- 👤 E Eastman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:29
CPC Classifications
A; A23; A23J; A23J3/00; A23J3/04; A23J3/08; A23L; A23L29/00; A23L29/20; A23L29/206; A23L29/262; Y; Y10; Y10S; Y10S530/00; Y10S530/827; Y10S530/833
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
A METHOD OR PREPARING A WATER-SOLUBLE, ESSENTIALLY CHEMICALLY NEUTRAL COMPLEX WHICH COMPRISES NEUTRALIZING A WATER-SOLUBLE COMPLEX, FORMED BY REACTING (1) PROTEIN WHICH IS AT LEAST DISPERSIBLE IN WATER WITH (2) SODIUM CARBOXYMETHYLCELLULOSE, THE WEIGHT RATIO OF PROTEIN TO SODIUM CARBOXYMETHYCELLULOSE BEING 2:1 TO 8:1, IN AN ACIDIC AQUEOUS MEDIUM AT A PH BELOW THE ISOELECTRIC POINT OF THE PROTEIN, BY REACTING SAID WATER-INSOLUBLE COMPLEX WITH A WATER-SOLUBLE HYDROXIDE IN A SOLVENT/WATER MEDIUM CONTAINING 55 TTO 99% BY WEIGHT OF WATER=MISCIBLE ORGANIC SOLVENT AND 1 TO 45% BY WEIGHT OF WATER, AND RECOVERING THE RESULTING WATER-SOLUBLE COMPLEX.
Claim 2
Independent Claim
96 words
A METHOD OR PREPARING A WATER-SOLUBLE, ESSENTIALLY CHEMICALLY NEUTRAL COMPLEX WHICH COMPRISES NEUTRALIZING A WATER-SOLUBLE COMPLEX, FORMED BY REACTING (1) PROTEIN WHICH IS AT LEAST DISPERSIBLE IN WATER WITH (2) SODIUM CARBOXYMETHYLCELLULOSE, THE WEIGHT RATIO OF PROTEIN TO SODIUM CARBOXYMETHYCELLULOSE BEING 2:1 TO 8:1, IN AN ACIDIC AQUEOUS MEDIUM AT A PH BELOW THE ISOELECTRIC POINT OF THE PROTEIN, BY REACTING SAID WATER-INSOLUBLE COMPLEX WITH A WATER-SOLUBLE HYDROXIDE IN A SOLVENT/WATER MEDIUM CONTAINING 55 TTO 99% BY WEIGHT OF WATER=MISCIBLE ORGANIC SOLVENT AND 1 TO 45% BY WEIGHT OF WATER, AND RECOVERING THE RESULTING WATER-SOLUBLE COMPLEX.
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) | 1977-10-14 | 1978-04-15 | 1978-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-14 | 1982-04-15 | 1982-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-14 | 1986-04-15 | 1986-10-15 | $7700.00 | Window Closed / Lapsed |