US5240632A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine dishwasher water spot control composition
Assignee: Access Business Group International LLC
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Filing: 1992-08-19
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Granted: 1993-08-31
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Expires: 2012-08-19
Abstract
Abstract Water spot reduction compositions containing an oxygen bleach, a proteolytic enzyme, and a polyacrylate for use in cleaning dishes and the like in a machine dishwasher. The compositions effectively reduce the presence of water spots which form on dish surfaces and the like during machine dishwashing operations.
Inventors
- 👤 Ernest H. Brumbaugh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:11
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/39; C11D3/3942; C11D3/16; C11D3/37; C11D3/3746; C11D3/3757; C11D3/3761; C11D3/3769; C11D3/38; C11D3/386; C11D3/38609
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
115 words
An automatic dishwasher detergent composition consisting essentially of: from about 20 to about 80 percent by weight of a phosphate builder, based on anhydrous phosphate weight; from about 0.5 to about 10 percent by weight surfactant; from about 5 to about 40 percent by weight alkali metal silicate; a quantity of an oxygen bleach sufficient to provide from about 0.05 to about 5 percent by weight available oxygen; a quantity of proteolytic enzyme sufficient to provide from about 2 to about 200 KNPU per kilogram of said detergent composition; and from about 0.1 to about 20 percent by weight polyacrylate, said polyacrylate having a molecular weight in the range from about 500 to about 200,000.
Claim 2
Dependent Claim
115 words
An automatic dishwasher detergent composition consisting essentially of: from about 20 to about 80 percent by weight of a phosphate builder, based on anhydrous phosphate weight; from about 0.5 to about 10 percent by weight surfactant; from about 5 to about 40 percent by weight alkali metal silicate; a quantity of an oxygen bleach sufficient to provide from about 0.05 to about 5 percent by weight available oxygen; a quantity of proteolytic enzyme sufficient to provide from about 2 to about 200 KNPU per kilogram of said detergent composition; and from about 0.1 to about 20 percent by weight polyacrylate, said polyacrylate having a molecular weight in the range from about 500 to about 200,000.
Claim 3
Dependent Claim
75 words
The detergent composition of claim 1 consisting essentially of: from about 20 to about 40 percent by weight of said phosphate builder; a quantity of said oxygen bleach sufficient to provide from about 0.1 to about 2% by weight available oxygen; a sufficient amount of said enzyme to provide from about 4 to about 80 KNPU per kilogram of said detergent composition; and from about 1 to about 10 percent by weight of said polyacrylate.
Claim 4
Dependent Claim
63 words
The detergent composition of claim 2 consisting essentially of: a sufficient quantity of said oxygen bleach to provide from about 0.25 to about 1 percent by weight available oxygen; a sufficient amount of said enzyme to provide from about 10 to about 40 KNPU per kilogram of said detergent composition; and from about 2.5 to about 5 percent by weight of said polyacrylate.
Claim 5
Dependent Claim
21 words
The detergent composition of claim 3 in which said polyacrylate has a molecular weight of from about 1,000 to about 10,000.
Claim 6
Dependent Claim
13 words
The detergent composition of claim 4 wherein said phosphate compound is a polyphosphate.
Claim 7
Dependent Claim
21 words
The detergent composition of claim 1 in which said polyacrylate has a molecular weight of from about 1,000 to about 10,000.
Claim 8
Dependent Claim
14 words
The automatic dishwashing composition of claim 6 wherein said phosphate compound is a polyphosphate.
Claim 9
Dependent Claim
21 words
The detergent composition of claim 1 in which said polyacrylate has a molecular weight of from about 1,000 to about 10,000.
Claim 10
Dependent Claim
14 words
The automatic dishwashing composition of claim 8 wherein said phosphate compound is a polyphosphate.
Claim 11
Dependent Claim
34 words
The automatic dishwasher detergent composition recited in claim 1 wherein said oxygen bleach is a water-soluble inorganic percompound selected from the group consisting of alkali and alkaline earth metal perborates, percarbonates, perphosphates and persulfates.
Claim 12
Dependent Claim
34 words
The automatic dishwasher detergent composition recited in claim 1 wherein said proteolytic enzyme is selected from the group consisting of trypsin, chymotripsin, pepsin, papain, bromelin, carboxylase, collagenuse, kecatinase, elastase, amino peptidase, subtilisin and aspergillopeptidase.
Claim 13
Dependent Claim
23 words
The automatic dishwasher detergent composition recited in claim 10 wherein said polyacrylate has a molecular weight of from about 1,000 to about 10,000.
Claim 14
Dependent Claim
33 words
The automatic dishwasher detergent composition recited in claim 12 wherein said polyacrylate is selected from the group consisting of polymers and copolymers of acrylic acid, methacrylic acid, esters of these acids, and acrylonitrile.
Claim 15
Dependent Claim
14 words
The automatic dishwashing composition of claim 1 wherein said phosphate compound is a polyphosphate.
Claim 16
Dependent Claim
27 words
The automatic dishwashing composition of claim 1 wherein said surfactant is selected from the group consisting of low-foaming fatty alcohol ethoxylates and ethylene oxide/propylene oxide block polymers.
References Cited (Backward Citations)
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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) | 1996-08-30 | 1997-03-01 | 1997-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-08-30 | 2001-03-01 | 2001-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-08-30 | 2005-03-01 | 2005-08-31 | $7700.00 | Window Closed / Lapsed |