Patent US2807591A successfully refreshed from Google Patents.
US2807591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-soluble gums of improved water solubility and method of producing same
Assignee: Hercules Powder Co
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Filing: 1953-11-20
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Granted: 1957-09-24
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Expires: 1973-11-20
Abstract
No abstract record available.
Inventors
- 👤 John E Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:36
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/03; C08J3/05; C08B; C08B11/00; C08B11/20; C08L; C08L1/00; C08L1/08; C08L1/26; C08L1/28; C08L1/286; C08J2300/00; C08J2300/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
AS A NEW COMPOSITION, A MIXTURE CONSISTING ESSENTIALLY OF SUBSTANTIALLY DRY FINELY DIVIDED WATER-SOLUBLE SODIUM CARBOXYMETHYLCELLULOSE HAVING A NORMAL TENDENCY WHEN MIXED WITH WATER TO FORM AGGLOMERATES, AND SUBSANTIALLY DRY FINELY DIVIDED WATER-SOLUBLE ADDITIVE MIXTURE WHICH IS SUBSTANTIALLY UNREACTIVE IN THE DRY STATE BUT REACTS READILY IN WATER TO EVOLVE CARBON DIOXIDE, SAID ADDITIVE MIXTURE CONTAINING AS ESSENTIAL INGREDIENTS A WATER-SOLUBLE CARBONATE AND AT LEAST ONE MEMBER OF THE GROUP CONSISTING OF WATER-SOLUBLE ACID SALTS AND CRYSTALLINE ACIDS AND BEING PRESENT IN AN AMOUNT OF AT LEAST ABOUT 10% BY WEIGHT BASED ON THE COMBINED WEIGHT OF ADDITIVE MIXTURE AND SODIUM CARBOXYMETHYLCELLULOSE TO EVOLVE SUFFICIENT CARBON DIOXIDE TO DISPERSE THE WATERSOLUBLE SODIUM CARBOXYMETHYLCELLULOSE IN WATER AND SUBSTANTIALLY REDUCE THE TENDENCY OF SAME TO FORM AGGLOMERATES AND THEREBY OBTAIN A RAPID SOLUTION RATE.
Claim 2
Dependent Claim
132 words
AS A NEW COMPOSITION, A MIXTURE CONSISTING ESSENTIALLY OF SUBSTANTIALLY DRY FINELY DIVIDED WATER-SOLUBLE SODIUM CARBOXYMETHYLCELLULOSE HAVING A NORMAL TENDENCY WHEN MIXED WITH WATER TO FORM AGGLOMERATES, AND SUBSANTIALLY DRY FINELY DIVIDED WATER-SOLUBLE ADDITIVE MIXTURE WHICH IS SUBSTANTIALLY UNREACTIVE IN THE DRY STATE BUT REACTS READILY IN WATER TO EVOLVE CARBON DIOXIDE, SAID ADDITIVE MIXTURE CONTAINING AS ESSENTIAL INGREDIENTS A WATER-SOLUBLE CARBONATE AND AT LEAST ONE MEMBER OF THE GROUP CONSISTING OF WATER-SOLUBLE ACID SALTS AND CRYSTALLINE ACIDS AND BEING PRESENT IN AN AMOUNT OF AT LEAST ABOUT 10% BY WEIGHT BASED ON THE COMBINED WEIGHT OF ADDITIVE MIXTURE AND SODIUM CARBOXYMETHYLCELLULOSE TO EVOLVE SUFFICIENT CARBON DIOXIDE TO DISPERSE THE WATERSOLUBLE SODIUM CARBOXYMETHYLCELLULOSE IN WATER AND SUBSTANTIALLY REDUCE THE TENDENCY OF SAME TO FORM AGGLOMERATES AND THEREBY OBTAIN A RAPID SOLUTION RATE.
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US2477492A
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US2637536A
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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) | 1960-09-23 | 1961-03-25 | 1961-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-23 | 1965-03-25 | 1965-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-23 | 1969-03-25 | 1969-09-24 | $7700.00 | Window Closed / Lapsed |