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Patent US4597886A successfully refreshed from Google Patents.
US4597886A
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US
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Dishwashing compositions
Assignee: Lever Brothers Co
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Filing: 1984-10-12
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Granted: 1986-07-01
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Expires: 2004-10-12
Abstract
Abstract By the inclusion of an effective level of a layered clay, e.g. a synthetic hectorite, in an enzymatic dishwashing composition, the formation of spots and films on the cleaned objects is significantly reduced.
Inventors
- 👤 Machiel Goedhart
- 👤 Franciscus H. Gortemaker
- 👤 Hermanus C. Kemper
- 👤 Hendrik S. Kielman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:18
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/02; C11D3/12; C11D3/124; C11D3/1246; C11D3/1253; C11D3/16; C11D3/38; C11D3/386
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
112 words
A powdered enzymatic mechanical dishwashing composition with a reduced tendency to spot- and film-formation consisting essentially of: (a) from 1-5% by weight of a nonionic detergent surfactant; (b) from 10-90% by weight of an alkali salt selected from the group consisting of the organic and inorganic builder salts; (c) from 0.001-10% by weight of an enzyme selected from the group consisting of amylases, proteases, lipases, cellulases and mixtures thereof; (d) from 0.5-60% by weight of a layered clay, said clay being a synthetic hectorite; and (e) a bleaching agent present in an effective amount to clean dishes; said composition having a pH between 10 and 12 at 3 g/l in aqueous solution.
Claim 2
Dependent Claim
112 words
A powdered enzymatic mechanical dishwashing composition with a reduced tendency to spot- and film-formation consisting essentially of: (a) from 1-5% by weight of a nonionic detergent surfactant; (b) from 10-90% by weight of an alkali salt selected from the group consisting of the organic and inorganic builder salts; (c) from 0.001-10% by weight of an enzyme selected from the group consisting of amylases, proteases, lipases, cellulases and mixtures thereof; (d) from 0.5-60% by weight of a layered clay, said clay being a synthetic hectorite; and (e) a bleaching agent present in an effective amount to clean dishes; said composition having a pH between 10 and 12 at 3 g/l in aqueous solution.
Claim 3
Dependent Claim
19 words
The composition of claim 1, comprising 1-5% of (a), 30-70% of (b), 0.1-5% of (c) and 0.5-25% of (d).
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) | 1989-06-30 | 1989-12-30 | 1990-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-30 | 1993-12-30 | 1994-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-30 | 1997-12-30 | 1998-07-01 | $7700.00 | Window Closed / Lapsed |