US4438014A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nonionic surfactants for automatic dishwasher detergents
Assignee: Union Carbide Corp
•
Filing: 1982-02-16
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Granted: 1984-03-20
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Expires: 2002-02-16
Abstract
Abstract Nonionic surfactants, for automatic dishwasher detergents, are provided having specific alkoxylates bonded to block oxypropylene and oxyethylene/oxypropylene mixtures. These surfactants provide enhanced low-foaming and wetting, and compatibility with active chlorine compounds.
Inventors
- 👤 Robert J. Scott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:07
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/0005; C11D3/0026; C11D1/00; C11D1/66; C11D1/722
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
A method of washing dishes comprising washing them in a mechanical dishwasher with an aqueous solution comprising a nonionic surfactant having a cloud point of 20°-30° C. and having the formula: R--O--A.sub.x --B--H wherein R is 2-ethylhexanol or n-octanol; A is an oxypropylene group; x is 8 or 9; and B is a random mixture of oxyethylene and oxypropylene groups with the molar ratio of oxyethylene to oxypropylene groups being about 3:1; in a dishwasher detergent exhibiting low-foaming, good wetting and scouring having a chlorine retention of at least 15 percent, and not needing an auxiliary foam suppressor.
Claim 2
Independent Claim
98 words
A method of washing dishes comprising washing them in a mechanical dishwasher with an aqueous solution comprising a nonionic surfactant having a cloud point of 20°-30° C. and having the formula: R--O--A.sub.x --B--H wherein R is 2-ethylhexanol or n-octanol; A is an oxypropylene group; x is 8 or 9; and B is a random mixture of oxyethylene and oxypropylene groups with the molar ratio of oxyethylene to oxypropylene groups being about 3:1; in a dishwasher detergent exhibiting low-foaming, good wetting and scouring having a chlorine retention of at least 15 percent, and not needing an auxiliary foam suppressor.
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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) | 1987-03-20 | 1987-09-19 | 1988-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-20 | 1991-09-19 | 1992-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-20 | 1995-09-19 | 1996-03-20 | $7700.00 | Window Closed / Lapsed |