US4199468A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkaline dishwasher detergent
Assignee: Procter and Gamble Co
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Filing: 1978-05-04
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Granted: 1980-04-22
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Expires: 1998-05-04
Abstract
Abstract Alkaline dishwasher detergent composition having a specific critical pH, and, preferably, a relatively high level of available chlorine, buffered with trisodium phosphate, containing a tripolyphosphate or pyrophosphate sequestering builder, and having a relatively high level of surfactant. The detergent composition is substantially free of highly alkaline materials and organic builders and preferably contains 2.0r alkali metal silicate and/or a preferred C17-C19 polyethoxylate surfactant.
Inventors
- 👤 Brian D. Barford
- 👤 Lawrence A. Gilbert
- 👤 Robert A. Staab
- 👤 Royal D. Collins
- 👤 Charles R. Ries
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:15
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/02; C11D3/04; C11D3/08; C11D3/0005; C11D3/0047; C11D3/0073; C11D3/395; C11D3/3958
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
169 words
An automatic dishwashing composition providing optimum cleaning and spotting and filming characteristics consisting essentially of: (1) from about 20% to about 50% of a sequestering builder selected from the group consisting of alkali metal, tripolyphosphates and pyrophosphates; (2) from about 8% to about 20% trisodium phosphate; (3) from about 5% to about 20% of SiO 2 , at least 50% of which is present as an alkali metal silicate having an SiO 2 :M 2 O ratio of about 2.0, and any remainder being present as a higher ratio silicate wherein M is selected from the group consisting of sodium and potassium; (4) available chlorine at a level of from about 0.5% to about 3%; and (5) from about 2.5% to about 15% of a low foaming nonionic surfactant said composition having a pH of from about 10.5 to 11.2 at 2,500 ppm and being substantially free of (1) materials having a pH of 12 or more at a concentration of 1% in water and (2) organic chelating builders.
Claim 2
Dependent Claim
169 words
An automatic dishwashing composition providing optimum cleaning and spotting and filming characteristics consisting essentially of: (1) from about 20% to about 50% of a sequestering builder selected from the group consisting of alkali metal, tripolyphosphates and pyrophosphates; (2) from about 8% to about 20% trisodium phosphate; (3) from about 5% to about 20% of SiO 2 , at least 50% of which is present as an alkali metal silicate having an SiO 2 :M 2 O ratio of about 2.0, and any remainder being present as a higher ratio silicate wherein M is selected from the group consisting of sodium and potassium; (4) available chlorine at a level of from about 0.5% to about 3%; and (5) from about 2.5% to about 15% of a low foaming nonionic surfactant said composition having a pH of from about 10.5 to 11.2 at 2,500 ppm and being substantially free of (1) materials having a pH of 12 or more at a concentration of 1% in water and (2) organic chelating builders.
Claim 3
Dependent Claim
12 words
The composition of claim 1 containing at least about 1% available chlorine.
Claim 4
Dependent Claim
17 words
The composition of claim 2 containing from about 9% to about 15% SiO 2 as sodium silicate.
Claim 5
Dependent Claim
21 words
The composition of claim 3 wherein from 10% to about 50% of the SiO 2 is present as 3.2 ratio silicate.
Claim 6
Dependent Claim
25 words
The composition of claim 2 which is completely free of materials having a pH of 12 or more at a concentration of 1% in water.
Claim 7
Dependent Claim
13 words
The composition of claim 2 which is completely free of organic chelating builders.
Claim 8
Dependent Claim
25 words
The composition of claim 6 which is completely free of materials having a pH of 12 or more at a concentration of 1% in water.
Claim 9
Dependent Claim
18 words
The composition of claim 2 containing available chlorine at a level of from about 1.25% to about 2.5%.
Claim 10
Dependent Claim
18 words
The composition of claim 3 containing from about 3% to about 10% of a low foaming nonionic surfactant.
Claim 11
Dependent Claim
18 words
The composition of claim 9 containing from about 5% to about 8% of a low foaming nonionic surfactant.
Claim 12
Dependent Claim
18 words
The composition of claim 10 containing available chlorine at a level of from about 1.25% to about 2.5%.
Claim 13
Dependent Claim
26 words
The composition of claim 3 completely free of (1) materials having a pH of 12 or more at 1% in water and (2) organic chelating builders.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-04-22 | 1983-10-22 | 1984-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-22 | 1987-10-22 | 1988-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-22 | 1991-10-22 | 1992-04-22 | $7700.00 | Window Closed / Lapsed |