Patent US4626374A successfully refreshed from Google Patents.
US4626374A
Expired / Lapsed
US
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Heavy metal adjuncts, their preparation and use
Assignee: Lever Brothers Co
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Filing: 1984-11-05
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Granted: 1986-12-02
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Expires: 2004-11-05
Abstract
Abstract A stable heavy metal adjunct, particularly manganese adjunct, for use as a peroxygen bleach catalyst is disclosed which comprises a matrix of a heavy meal salt provided with a surface powder coating of desiccant microsized powdered material having a mean particle size of less than 25 μm. A process for preparing said adjunct and bleaching and detergent compositions containing said adjunct are also disclosed. Preferred heavy metal is manganese and preferred surface powder coating is with microsized silicon dioxide (silica).
Inventors
- 👤 Timothy D. Finch
- 👤 Raymond J. Wilde
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:36
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/39; C11D3/3902; C11D3/3905; C11D3/3935; C11D3/3932
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
64 words
A stable heavy metal adjunct for use as a bleach catalyst comprising a matrix of a heavy metal salt having atomic numbers of from 24 to 29 provided with a surface powder coating of desiccant microsized inert powdered material with a mean particle size of less than 25 μm in an amount of from 0.5 to 20% by weight of the heavy metal salt.
Claim 2
Dependent Claim
64 words
A stable heavy metal adjunct for use as a bleach catalyst comprising a matrix of a heavy metal salt having atomic numbers of from 24 to 29 provided with a surface powder coating of desiccant microsized inert powdered material with a mean particle size of less than 25 μm in an amount of from 0.5 to 20% by weight of the heavy metal salt.
Claim 3
Dependent Claim
17 words
Heavy metal adjunct according to claim 1, wherein said heavy metal salt is a manganese (II) salt.
Claim 4
Dependent Claim
22 words
Heavy metal adjunct according to claim 1, wherein said microsized powdered material has a mean particle size of less than 10 μm.
Claim 5
Dependent Claim
17 words
Heavy metal adjunct according to claim 1, wherein said microsized powdered material is microsized silicon dioxide (silica).
Claim 6
Dependent Claim
33 words
Heavy metal adjunct according to claim 1, wherein said surface powder coating of microsized powdered material is provided in an amount of from 1 to 10% by weight of the heavy metal salt.
Claim 7
Dependent Claim
60 words
Process for preparing a stable heavy metal adjunct for use as a bleach catalyst comprising dusting a heavy metal salt having atomic numbers of from 24 to 29 with a desiccant microsized inert powdered material with a mean particle size of less than 25 μm to an amount of from 0.5 to 20% by weight of said heavy metal salt.
Claim 8
Dependent Claim
60 words
Process for preparing a stable heavy metal adjunct for use as a bleach catalyst comprising dusting a heavy metal salt having atomic numbers of from 24 to 29 with a desiccant microsized inert powdered material with a mean particle size of less than 25 μm to an amount of from 0.5 to 20% by weight of said heavy metal salt.
Claim 9
Dependent Claim
15 words
Process according to claim 6, wherein said heavy metal salt is a manganese (II) salt.
Claim 10
Dependent Claim
20 words
Process according to claim 6, wherein said microsized powdered material has a mean particle size of less than 10 μm.
Claim 11
Dependent Claim
15 words
Process according to claim 6, wherein said microsized powdered material is microsized silicon dioxide (silica).
Claim 12
Dependent Claim
31 words
Process according to claim 6, wherein said surface powder coating of microsized powdered material is provided in an amount of from 1 to 10% by weight of the heavy metal salt.
Claim 13
Dependent Claim
98 words
A solid particulate bleaching and detergent composition comprising 5 to 90% by weight of a peroxygen bleaching agent, 5 to 95% by weight of a sequestrant builder and from 0.025 to 10% by weight of a heavy metal adjunct comprising a matrix of a heavy metal salt having atomic numbers of from 24 to 29 provided with a surface powder coating of desiccant microsized inert powdered material with a mean particle size of less than 25 μm, the surface powder coating being applied in an amount of from 0.5 to 20% by weight of said heavy metal salt.
Claim 14
Dependent Claim
98 words
A solid particulate bleaching and detergent composition comprising 5 to 90% by weight of a peroxygen bleaching agent, 5 to 95% by weight of a sequestrant builder and from 0.025 to 10% by weight of a heavy metal adjunct comprising a matrix of a heavy metal salt having atomic numbers of from 24 to 29 provided with a surface powder coating of desiccant microsized inert powdered material with a mean particle size of less than 25 μm, the surface powder coating being applied in an amount of from 0.5 to 20% by weight of said heavy metal salt.
Claim 15
Dependent Claim
16 words
A composition according to claim 11, wherein said heavy metal salt is a manganese (II) salt.
Claim 16
Dependent Claim
16 words
A composition according to claim 11, wherein said microsized powdered material is microsized silicon dioxide (silica).
Claim 17
Dependent Claim
21 words
A composition according to claim 11, wherein said microsized powdered material has a mean particle size of less than 10 μm.
Claim 18
Dependent Claim
34 words
A composition according to claim 11, which further comprises from 2 to 50% by weight of a surface-active agent selected from the group of anionic, non-ionic, zwitterionic and cationic surface-active agents, and mixtures thereof.
Claim 19
Dependent Claim
17 words
A composition according to claim 11, comprising 0.05 to 5% by weight of said heavy metal adjunct.
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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) | 1989-12-01 | 1990-06-02 | 1990-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-01 | 1994-06-02 | 1994-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-01 | 1998-06-02 | 1998-12-02 | $7700.00 | Window Closed / Lapsed |