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Patent US4620936A successfully refreshed from Google Patents.
US4620936A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine-dishwashing compositions
Assignee: Lever Brothers Co
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Filing: 1984-08-06
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Granted: 1986-11-04
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Expires: 2004-08-06
Abstract
Abstract A mildly alkaline enzymatic detergent cleaning composition adapted for use in automatic dishwashing machines comprising (a) an amylolytic enzyme, (b) sodium triphosphate, (c) sodium carbonate and/or borax, (d) sodium silicate, (e) a peroxy compound bleach, (f) a stabilizing agent, and optionally but preferably (g) a proteolytic enzyme and/or (h) a low- to non-foaming nonionic surfactant and/or (i) a fatty acid having chain length of about 12-18 carbon atoms, the amounts of components (b), (c) and (d) being so adjusted that the composition will have sufficent builder and buffering capacity to maintain a solution-pH of from 9.3 to 10.8. The composition presented in the form of a particulate product is an effective machine dishwashing composition comparable to conventional highly alkaline chlorine bleach-containing products.
Inventors
- 👤 Hendrik S. Kielman
- 👤 Jan S. Bongers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:59
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/36; C11D3/364; C11D3/02; C11D3/04; C11D3/046; C11D3/06; C11D3/08; C11D3/10; C11D3/38; C11D3/386; C11D3/38609; C11D3/39; C11D3/3902; C11D3/3937; C11D3/394
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
184 words
Detergent cleaning composition adapted for use in automatic dishwashing machines comprising: (a) from 0.2 to 5% by weight of an amylolytic enzyme such that the final composition has amylolytic activity of from 10 3 to 10 6 Maltose Units/kg; (b) from 25 to 50% by weight of sodium triphosphate; (c) from 7.5 to 40% by weight of sodium carbonate and/or borax; (d) from 2 to 15% by weight of sodium silicate, having SiO 2 : Na 2 O ratio of from 1:1 to 4:1; (e) from 5 to 25% by weight of a peroxy compound bleach selected from the group of solid peroxy acids and their salts; and mixtures of a solid hydrogen peroxide adduct with an activator wherein the ratio by weight of said hydrogen peroxide adduct to activator is within the range of from 8:1 to 1:1; and (f) from 0.05 to 1% by weight of a stabilizing agent for the bleaching agent; the amounts of components (b), (c) and (d) being so adjusted that the composition will have sufficient builder and buffering capacity to maintain a solution pH of from 9.3-10.8.
Claim 2
Dependent Claim
184 words
Detergent cleaning composition adapted for use in automatic dishwashing machines comprising: (a) from 0.2 to 5% by weight of an amylolytic enzyme such that the final composition has amylolytic activity of from 10 3 to 10 6 Maltose Units/kg; (b) from 25 to 50% by weight of sodium triphosphate; (c) from 7.5 to 40% by weight of sodium carbonate and/or borax; (d) from 2 to 15% by weight of sodium silicate, having SiO 2 : Na 2 O ratio of from 1:1 to 4:1; (e) from 5 to 25% by weight of a peroxy compound bleach selected from the group of solid peroxy acids and their salts; and mixtures of a solid hydrogen peroxide adduct with an activator wherein the ratio by weight of said hydrogen peroxide adduct to activator is within the range of from 8:1 to 1:1; and (f) from 0.05 to 1% by weight of a stabilizing agent for the bleaching agent; the amounts of components (b), (c) and (d) being so adjusted that the composition will have sufficient builder and buffering capacity to maintain a solution pH of from 9.3-10.8.
Claim 3
Dependent Claim
38 words
Detergent cleaning composition according to claim 1, which further comprises from 0.2 to 5% by weight of a proteolytic enzyme such that the final composition has proteolytic enzyme activity of from 10 6 to 10 8 Glycine Units/kg.
Claim 4
Dependent Claim
23 words
Detergent cleaning composition according to claim 1 which further comprises from 0.1 to 5% by weight of a low to non-foaming nonionic surfactant.
Claim 5
Dependent Claim
29 words
Detergent cleaning composition according to claim 1, which further comprises from 0.5 to 5% by weight of a fatty acid having a chain length of about 12-18 carbon atoms.
Claim 6
Dependent Claim
20 words
Detergent cleaning composition according to claim 1, which comprises from 10 to 35% by weight of sodium carbonate and/or borax.
Claim 7
Dependent Claim
28 words
Detergent cleaning composition according to claim 2, wherein said proteolytic enzyme is a protease obtained from a strain of Bacillus having maximum activity throughout the pH-range of 8-12.
Claim 8
Dependent Claim
28 words
Detergent cleaning composition according to claim 1, wherein said activator is selected from tetraacetyl ethylene diamine (TAED), tetraacetylglycoluril (TAGU), glucose pentaacetate (GPA) and xylosetetraacetate (XTA) and mixtures thereof.
Claim 9
Dependent Claim
40 words
Detergent cleaning composition according to claim 1, wherein said stabilizing agent for the bleaching agent is selected from ethylene diamine tetra(methylene phosphonic acid), diethylene triamine penta(methylene phosphonic acid), their water-soluble salts and their complexes with Calcium, Magnesium, Aluminium or Zinc.
Claim 10
Dependent Claim
16 words
Detergent cleaning composition according to claim 1, having a solution pH of from 9.5 to 10.5.
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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) | 1989-11-03 | 1990-05-05 | 1990-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-11-03 | 1994-05-05 | 1994-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-11-03 | 1998-05-05 | 1998-11-04 | $7700.00 | Window Closed / Lapsed |