US4092258A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Powder detergent compositions
Assignee: DeSoto Inc
•
Filing: 1975-08-21
•
Granted: 1978-05-30
•
Expires: 1995-08-21
Abstract
Abstract Powder detergent compositions for machine dish washing which are effective in hard water in the absence of phosphates are provided based on a combination of low foaming nonionic surfactant, bleaching agent, and from 8-70% of ammonium sulfate, ammonium borate, ammonium carbonate, ammonium bicarbonate, or a mixture thereof. The composition is required to provide a pH in the range of pH 7.0 to pH 8.5 measured in 1% water solution.
Inventors
- 👤 Robert L. McLaughlin
- 👤 Donald C. Wood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:15
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/02; C11D3/04; C11D3/046; C11D1/00; C11D1/66; C11D1/72; C11D3/0005; C11D3/0047; C11D3/39; C11D3/3942; C11D3/395
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
143 words
A powder detergent composition adapted for machine dish washing using hard water and which does not require the presence of phosphates consisting essentially of the following components by weight: 1. as the essential surfactant, from 2- 8% of low foaming nonionic surfactant useful for machine dish washing, 2. from 0.5- 5% of available chlorine or oxygen from a bleaching agent, 3. from 8- 70% of ammonium sulfate, ammonium borate, ammonium carbonate, ammonium bicarbonate, or a mixture thereof, 4. from 0- 50% of borax, 5. from 0-to about 1% of a sequestrant having an affinity for iron, and 6. any balance of said detergent consisting essentially of inert particulate filler which does not precipitate calcium or magnesium salts at use concentration, said composition providing a pH in the range of pH 7.0 - pH 8.5 when the composition is placed in 1% water solution.
Claim 2
Dependent Claim
143 words
A powder detergent composition adapted for machine dish washing using hard water and which does not require the presence of phosphates consisting essentially of the following components by weight: 1. as the essential surfactant, from 2- 8% of low foaming nonionic surfactant useful for machine dish washing, 2. from 0.5- 5% of available chlorine or oxygen from a bleaching agent, 3. from 8- 70% of ammonium sulfate, ammonium borate, ammonium carbonate, ammonium bicarbonate, or a mixture thereof, 4. from 0- 50% of borax, 5. from 0-to about 1% of a sequestrant having an affinity for iron, and 6. any balance of said detergent consisting essentially of inert particulate filler which does not precipitate calcium or magnesium salts at use concentration, said composition providing a pH in the range of pH 7.0 - pH 8.5 when the composition is placed in 1% water solution.
Claim 3
Dependent Claim
17 words
A powder detergent composition as recited in claim 1 in which phosphates are absent from the composition.
Claim 4
Dependent Claim
18 words
A powder detergent composition as recited in claim 1 in which said sequestrant is ethylene diamine tetraacetic acid.
Claim 5
Dependent Claim
22 words
A powder detergent composition as recited in claim 1 in which said borax is present in an amount of at least 10%.
Claim 6
Dependent Claim
18 words
A powder detergent composition as recited in claim 1 in which said borax is present as a pentahydrate.
Claim 7
Dependent Claim
18 words
A powder detergent composition as recited in claim 1 in which said borax is present as a decahydrate.
Claim 8
Dependent Claim
23 words
A powder detergent composition as recited in claim 1 in which inert particulate filler is present in an amount of at least 15%.
Claim 9
Dependent Claim
18 words
A powder detergent composition as recited in claim 7 in which said inert particulate filler comprises sodium sulfate.
Claim 10
Dependent Claim
42 words
A powder detergent composition as recited in claim 1 in which said nonionic surfactant comprises an ethylene oxide adduct of hydrophobic organic compound, the adduct containing from about 3 to about 30 mols of adducted ethylene oxide per mol of said compound.
Claim 11
Dependent Claim
29 words
A powder detergent composition as recited in claim 1 in which said nonionic surfactant is an ethylene oxide adduct of a monohydric alcohol containing from 8- 22 carbon atoms.
Claim 12
Dependent Claim
34 words
A powder detergent composition as recited in claim 10 in which said nonionic surfactant contains from 3- 6 mols of ethylene oxide per mol of C 8 - C 18 primary straight chain alcohol.
Claim 13
Dependent Claim
69 words
A powder detergent composition as recited in claim 11 in which said nonionic surfactant further comprises a liquid in which ethylene oxide is adducted onto a poly(oxypropylene) hydrophobe having a molecular weight in the range of about 900 to about 4000, the adduct containing from about 5 to about 55% of poly(oxyethylene), the two types of nonionic surfactants being used in a weight ratio of from 1:5 to 5:1.
Claim 14
Dependent Claim
22 words
A powder detergent composition as recited in claim 12 in which said poly(oxypropylene) hydrophobe has a molecular weight of from 2100 -3600.
Claim 15
Dependent Claim
22 words
A powder detergent composition as recited in claim 1 in which said nonionic surfactant is used in an amount of from 3-6%.
Claim 16
Dependent Claim
22 words
A powder detergent composition as recited in claim 1 in which said composition further includes up to about 2% of anionic surfactant.
Claim 17
Dependent Claim
17 words
A powder detergent composition as recited in claim 1 in which said bleaching agent supplies active chlorine.
Claim 18
Dependent Claim
20 words
A powder detergent composition as recited in claim 1 in which enzymes are present in combination with an oxygen bleach.
Claim 19
Dependent Claim
24 words
A powder detergent composition as recited in claim 1 in which borax is absent, and said component (3) consists of 10-70% of ammonium sulfate.
Claim 20
Dependent Claim
23 words
A powder detergent composition as recited in claim 1 in which said component (3) is present in an amount of 25% to 50%.
Claim 21
Dependent Claim
19 words
A powder detergent composition as recited in claim 1 in which said inert particulate filler consists of sodium sulfate.
References Cited (Backward Citations)
US3048548A
Cited
US3248335A
Cited
US3549539A
Cited
US3696041A
Cited
US3825498A
Cited
US3826748A
Cited
US3941710A
Cited
US3817869A
Cited
US3880778A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-05-29 | 1981-11-28 | 1982-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-29 | 1985-11-28 | 1986-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-29 | 1989-11-28 | 1990-05-30 | $7700.00 | Window Closed / Lapsed |