Patent US4579676A successfully refreshed from Google Patents.
US4579676A
Expired / Lapsed
US
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Low-phosphate liquid cleaning composition
Assignee: Ecolab Inc
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Filing: 1984-12-17
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Granted: 1986-04-01
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Expires: 2004-12-17
Abstract
Abstract Aqueous alkaline cleaning concentrates and wash solutions are disclosed which comprise an alkali metal hydroxide, a water-conditioning acrylic polymer, an active chlorine source and a fatty or oily soil-dispersing amount of a phosphinopolycarboxylic acid. The wash solutions are particularly useful to clean cleaned-in-place food-processing equipment which has been fouled with greasy or oily soils.
Inventors
- 👤 Sandra L. Bull
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:08
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/395; C11D3/3956; C11D3/16; C11D3/36; C11D3/365; C11D3/37; C11D3/3746; C11D3/3784
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
130 words
A process for cleaning an article fouled with fatty or oily soil comprising: (A) dissolving about 0.1-5.0 parts by weight of a liquid cleaning concentrate in about 100 parts by weight of water to form an aqueous wash solution said concentrate comprising: a solution of (a) about 5-35% of an alkali metal hydroxide; (b) about 0.5-15% of a water-soluble acrylic polymer having a molecular weight of about 1,000-15,000; (c) an amount of an active chlorine source effective to provide the concentrate with about 2-10% available chlorine; (d) an amount of a phosphinopolycarboxylic acid effective to disperse fatty or oily soil; (e) about 50-90% water; and (B) contacting said aqueous wash solution of (A) with the fouled article for a period of time effective to disperse said fatty or oily soil.
Claim 2
Dependent Claim
130 words
A process for cleaning an article fouled with fatty or oily soil comprising: (A) dissolving about 0.1-5.0 parts by weight of a liquid cleaning concentrate in about 100 parts by weight of water to form an aqueous wash solution said concentrate comprising: a solution of (a) about 5-35% of an alkali metal hydroxide; (b) about 0.5-15% of a water-soluble acrylic polymer having a molecular weight of about 1,000-15,000; (c) an amount of an active chlorine source effective to provide the concentrate with about 2-10% available chlorine; (d) an amount of a phosphinopolycarboxylic acid effective to disperse fatty or oily soil; (e) about 50-90% water; and (B) contacting said aqueous wash solution of (A) with the fouled article for a period of time effective to disperse said fatty or oily soil.
Claim 3
Dependent Claim
19 words
The process of claim 1 wherein the aqueous wash solution is applied to said articles at about 50°-75° C.
Claim 4
Dependent Claim
29 words
The process of claim 1 wherein the phosphinopolycarboxylic acid is present in the cleaning concentrate at a concentration of about 0.05-15% and has a molecular weight of about 200-5000.
Claim 5
Dependent Claim
18 words
The process of claim 1 wherein the alkali metal hydroxide comprises sodium hydroxide, potassium hydroxide or mixtures thereof.
Claim 6
Dependent Claim
15 words
The process of claim 1 wherein the active chlorine source comprises an alkali metal hypochlorite.
Claim 7
Dependent Claim
10 words
The process of claim 1 which is a cleaning-in-place process.
Claim 8
Dependent Claim
79 words
An aqueous alkaline cleaning concentrate effective to disperse and degrade fatty or oily soil comprising: a solution of (a) about 5-35% of an alkali metal hydroxide; (b) about 0.5-15% of a water-conditioning acrylic polymer having a molecular weight of about 1,000-15,000; (c) an amount of an active chlorine source effective to provide the concentrate with about 2-10% available chlorine; (d) about 0.05-15% of a water-soluble phosphinopolycarboxylic acid having a molecular weight of about 250-5000; and (e) about 50-90% water.
Claim 9
Dependent Claim
79 words
An aqueous alkaline cleaning concentrate effective to disperse and degrade fatty or oily soil comprising: a solution of (a) about 5-35% of an alkali metal hydroxide; (b) about 0.5-15% of a water-conditioning acrylic polymer having a molecular weight of about 1,000-15,000; (c) an amount of an active chlorine source effective to provide the concentrate with about 2-10% available chlorine; (d) about 0.05-15% of a water-soluble phosphinopolycarboxylic acid having a molecular weight of about 250-5000; and (e) about 50-90% water.
Claim 10
Dependent Claim
14 words
The cleaning concentrate of claim 7 wherein said phosphinopolycarboxylic salt comprises a phosphinopolyacrylic acid.
Claim 11
Dependent Claim
19 words
The cleaning concentrate of claim 7 wherein the alkali metal hydroxide comprises sodium hydroxide, potassium hydroxide or mixtures thereof.
Claim 12
Dependent Claim
25 words
The cleaning concentrate of claim 7 wherein said acrylic polymer comprises polyacrylic acid, the partial sodium salt of polyacrylic acid, sodium polyacrylate or mixtures thereof.
Claim 13
Dependent Claim
17 words
The cleaning composition of claim 10 wherein the molecular weight of said acrylic polymer is about 2,000-10,000.
Claim 14
Dependent Claim
16 words
The cleaning concentrate of claim 7 wherein said active chlorine sources comprises an alkali metal hypochlorite.
Claim 15
Dependent Claim
12 words
The cleaning concentrate of claim 12 which comprises about 2-5% sodium hypochlorite.
Claim 16
Dependent Claim
106 words
An aqueous alkaline cleaning concentrate effective to disperse and degrade fatty or oily soil comprising: a solution of (a) about 10-20% sodium hydroxide, potassium hydroxide or mixtures thereof; (b) about 1-10% of an acrylic polymer comprising polyacrylic acid, the partial sodium salt of polyacrylic acid or sodium polyacrylate having a molecular weight of about 1000-6000; (c) an amount of sodium hypochlorite or calcium hypochlorite effective to provide about 2-10% available chlorine; (d) about 0.1-6% of a phosphinoacrylic polymer having a molecular weight of about 200-5000 and a weight ratio of polyacrylic acid to phosphinoxy units of from about 3:1 to 35:1; and (e) about 50-90% water.
Claim 17
Dependent Claim
106 words
An aqueous alkaline cleaning concentrate effective to disperse and degrade fatty or oily soil comprising: a solution of (a) about 10-20% sodium hydroxide, potassium hydroxide or mixtures thereof; (b) about 1-10% of an acrylic polymer comprising polyacrylic acid, the partial sodium salt of polyacrylic acid or sodium polyacrylate having a molecular weight of about 1000-6000; (c) an amount of sodium hypochlorite or calcium hypochlorite effective to provide about 2-10% available chlorine; (d) about 0.1-6% of a phosphinoacrylic polymer having a molecular weight of about 200-5000 and a weight ratio of polyacrylic acid to phosphinoxy units of from about 3:1 to 35:1; and (e) about 50-90% water.
Claim 18
Dependent Claim
16 words
A wash solution formed by diluting the concentrate of claim 7 to about 0.1-10% with water.
Claim 19
Dependent Claim
16 words
A wash solution formed by diluting the concentrate of claim 14 to about 0.2-5% with water.
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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) | 1989-03-31 | 1989-09-30 | 1990-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-31 | 1993-09-30 | 1994-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-31 | 1997-09-30 | 1998-04-01 | $7700.00 | Window Closed / Lapsed |