US2579381A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cellulose derivative composition of improved solubility
Assignee: EIDP Inc
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Filing: 1949-10-05
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Granted: 1951-12-18
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Expires: 1969-10-05
Abstract
No abstract record available.
Inventors
- 👤 Funderburk George Otis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:51
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/02; C11D3/04; C11D3/046; C11D3/16; C11D3/20; C11D3/22; C11D3/222; C11D3/225
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
A COMPOSITION OF MATTER COMPRISING A WATERSOLUBLE CELLULOSE DERIVATIVE OF THE GROUP CONSISTING OF THE ALKAL-METAL CARBOXYMETHYL-CELLULOSES AND ALKALI-METAL HYDROXYETHYL CELLULOSES, AND A WATER-DISPERSIBLE ALUMINUM POLYBORATE IN QUANTITY NOT LESS THAN 10% BY WEIGHT OF SAID WATERSOLUBLE CELLULOSE DERIVATIVE, SAID ALUMINUM POLYBORATE BEING THE WATER-DISPERSIBLE REACTION PRODUCT OBTAINED BY REACTING IN AQUEOUS MEDIUM A QUANTITY OF WATER-SOLUBLE ALUMINUM SALT EQUIVALENT TO 1 PART BY WEIGHT OF ALUMINUM SULFATE WITH A QUANTITY OF A WATER-SOLUBLE BORATE EQUIVALENT TO FROM 1 TO 8 PARTS BY WEIGHT OF ANHYDROUS BORAX, AND SAID COMPOSITION BEIGN CHARACTERIZED BY A HIGHER SPEED OF DISSOLUTION THAN THAT OF SAID WATER-SOLUBLE CELLULOSE DERIVATIVE WHEN TAKEN BY ITSELF.
Claim 2
Dependent Claim
109 words
A COMPOSITION OF MATTER COMPRISING A WATERSOLUBLE CELLULOSE DERIVATIVE OF THE GROUP CONSISTING OF THE ALKAL-METAL CARBOXYMETHYL-CELLULOSES AND ALKALI-METAL HYDROXYETHYL CELLULOSES, AND A WATER-DISPERSIBLE ALUMINUM POLYBORATE IN QUANTITY NOT LESS THAN 10% BY WEIGHT OF SAID WATERSOLUBLE CELLULOSE DERIVATIVE, SAID ALUMINUM POLYBORATE BEING THE WATER-DISPERSIBLE REACTION PRODUCT OBTAINED BY REACTING IN AQUEOUS MEDIUM A QUANTITY OF WATER-SOLUBLE ALUMINUM SALT EQUIVALENT TO 1 PART BY WEIGHT OF ALUMINUM SULFATE WITH A QUANTITY OF A WATER-SOLUBLE BORATE EQUIVALENT TO FROM 1 TO 8 PARTS BY WEIGHT OF ANHYDROUS BORAX, AND SAID COMPOSITION BEIGN CHARACTERIZED BY A HIGHER SPEED OF DISSOLUTION THAN THAT OF SAID WATER-SOLUBLE CELLULOSE DERIVATIVE WHEN TAKEN BY ITSELF.
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) | 1954-12-17 | 1955-06-18 | 1955-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-17 | 1959-06-18 | 1959-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-17 | 1963-06-18 | 1963-12-18 | $7700.00 | Window Closed / Lapsed |