Patent US4021359A successfully refreshed from Google Patents.
US4021359A
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Detergent builders for washing and cleaning compositions
Assignee: Mobil Oil AS
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Filing: 1973-10-11
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Granted: 1977-05-03
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Expires: 1993-10-11
Abstract
Abstract Novel compounds comprising water-soluble salts of partial esters of maleic anhydride and polyhydric alcohols containing at least three hydroxy groups sequester and retard the precipitation of Ca<++> ions, and function as detergent builders for washing and cleaning compositions in aqueous solutions thereof.
Inventors
- 👤 Frederick C. Schwab
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:02
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/20; C11D3/2093
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
95 words
A detergent composition consisting essentially of between about 5 percent and about 50 percent, by weight of the total composition, of a detergent-active compound and a detergent builder compound having the formula: R--(OOC--CH=CH--COOM) n , wherein M is an alkali metal or ammonium ion; R is the residue of a polyol selected from the group consisting of pentaerythritol, dipentaerythritol, tripentaerythritol, sorbitol, sucrose, mannitol, and arabitol; and n is the number of hydroxyl groups of said polyol; the weight ratio of said detergent builder compound to said detergent-active compound being between about 10:1 and about 1:10.
Claim 2
Dependent Claim
95 words
A detergent composition consisting essentially of between about 5 percent and about 50 percent, by weight of the total composition, of a detergent-active compound and a detergent builder compound having the formula: R--(OOC--CH=CH--COOM) n , wherein M is an alkali metal or ammonium ion; R is the residue of a polyol selected from the group consisting of pentaerythritol, dipentaerythritol, tripentaerythritol, sorbitol, sucrose, mannitol, and arabitol; and n is the number of hydroxyl groups of said polyol; the weight ratio of said detergent builder compound to said detergent-active compound being between about 10:1 and about 1:10.
Claim 3
Dependent Claim
13 words
A detergent composition defined in claim 1, wherein M is a sodium ion.
Claim 4
Dependent Claim
12 words
A detergent composition defined in claim 2, wherein said polyol is tripentaerythritol.
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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) | 1980-05-02 | 1980-11-01 | 1981-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-02 | 1984-11-01 | 1985-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-02 | 1988-11-01 | 1989-05-03 | $7700.00 | Window Closed / Lapsed |