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US3941771A
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Dextrin carboxylates and their use as detergent builders
Assignee: FMC Corp
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Filing: 1973-08-22
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Granted: 1976-03-02
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Expires: 1993-08-22
Abstract
Abstract A dextrin carboxylate comprising a dextrinized starch of about 20 to about 100 anhydroglucose units wherein from about 2.2 to about 2.8, preferably about 2.6 average OH groups per anhydroglucose unit are esterified through one of the carboxyls of a non-aromatic polycarboxylic acid of 2-4 carboxyls containing 2 to 10 carbon atoms. The products are effective biodegradable detergent builders.
Inventors
- 👤 Joseph H. Finley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:00
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/20; C11D3/22; C11D3/222; C11D3/226; C08; C08B; C08B31/00; C08B31/02; C08B31/04
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
54 words
A dextrin carboxylate comprising a dextrinized starch of about 20 to about 100 anhydroglucose units wherein from about 2.2 to about 2.8 average OH groups per anhydroglucose unit are esterified through one of the carboxyls of a non-aromatic polycarboxylic acid of 2-4 carboxyls containing 2 to 10 carbon atoms and the water-soluble salts thereof.
Claim 2
Dependent Claim
54 words
A dextrin carboxylate comprising a dextrinized starch of about 20 to about 100 anhydroglucose units wherein from about 2.2 to about 2.8 average OH groups per anhydroglucose unit are esterified through one of the carboxyls of a non-aromatic polycarboxylic acid of 2-4 carboxyls containing 2 to 10 carbon atoms and the water-soluble salts thereof.
Claim 3
Dependent Claim
13 words
A composition according to claim 1 wherein the dextrin carboxylate is dextrin succinate.
Claim 4
Dependent Claim
15 words
A composition according to claim 1 wherein the dextrin carboxylate is dextrin cis 4-cyclohexene-1,2 dicarboxylate.
Claim 5
Dependent Claim
14 words
The composition according to claim 1 wherein the dextrin carboxylate is dextrin butane tetracarboxylate.
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) | 1979-03-02 | 1979-09-01 | 1980-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-02 | 1983-09-01 | 1984-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-02 | 1987-09-01 | 1988-03-02 | $7700.00 | Window Closed / Lapsed |