Patent US3966628A successfully refreshed from Google Patents.
US3966628A
Expired / Lapsed
US
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Solid cleaning compositions containing C21 dicarboxylic acid
Assignee: Westvaco Corp
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Filing: 1974-08-21
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Granted: 1976-06-29
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Expires: 1994-08-21
Abstract
Abstract Solid free-flowing, non-toxic cleaning compositions in the form of dry mix and powdered formulations of alkaline builders combined with from about 0.5% to about 15% of C 21 dicarboxylic acid. An alternative embodiment comprises alkaline builders combined with a mixture of salts of C 21 dicarboxylic acid in a concentration of from about 0.5% to about 28% with nonionic synthetic detergents in a 1:1 to 2:1 weight ratio of C 21 dicarboxylic acid to nonionic synthetic detergent.
Inventors
- 👤 Fred E. Woodward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:45
CPC Classifications
C; C11; C11D; C11D1/00; C11D1/02; C11D1/04; C11D1/08; C11D3/00; C11D3/02; C11D3/04; C11D3/044; C11D3/16; C11D3/20; C11D3/2075; C11D3/2082
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
74 words
An alkaline dry mix and powdered formulation cleaning composition consisting essentially of an alkaline builder and from about 0.5% to about 15% by weight of a C 21 dicarboxylic acid having the structure ##EQU3## wherein x and y are integers from 3 to 9, x and y together equal 12, wherein one Z is hydrogen (H), and the other Z is a carboxylic acid group (COOH), the acid being in anhydrous free acid form.
Claim 2
Dependent Claim
74 words
An alkaline dry mix and powdered formulation cleaning composition consisting essentially of an alkaline builder and from about 0.5% to about 15% by weight of a C 21 dicarboxylic acid having the structure ##EQU3## wherein x and y are integers from 3 to 9, x and y together equal 12, wherein one Z is hydrogen (H), and the other Z is a carboxylic acid group (COOH), the acid being in anhydrous free acid form.
Claim 3
Dependent Claim
14 words
A composition according to claim 1 wherein x is 5 and y is 7.
Claim 4
Dependent Claim
25 words
A composition according to claim 1 wherein the builder is sodium hydroxide and the concentration of the acid is between about 0.5% and about 2%.
Claim 5
Dependent Claim
27 words
A composition according to claim 1 wherein the builder is sodium metasilicate and the concentration of the acid is between about 0.5% and up to about 10%.
Claim 6
Dependent Claim
25 words
A composition according to claim 1 wherein the builder is soda ash and the concentration of the acid is from about 1% to about 15%.
References Cited (Backward Citations)
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US3579453A
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US3725286A
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US3776850A
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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) | 1979-06-29 | 1979-12-29 | 1980-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-29 | 1983-12-29 | 1984-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-29 | 1987-12-29 | 1988-06-29 | $7700.00 | Window Closed / Lapsed |