Patent US4642198A successfully refreshed from Google Patents.
US4642198A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid bleaching compositions
Assignee: Lever Brothers Co
•
Filing: 1985-04-26
•
Granted: 1987-02-10
•
Expires: 2005-04-26
Abstract
Abstract Aqueous liquid bleaching compositions comprising a solid, particulate, substantially water-insoluble organic peroxy acid, e.g. diperoxydodecanedioic acid, stably suspended in an acidic surfactant structured liquid comprising a surfactant, an electrolyte and water in the substantial absence of a thickening agent.
Inventors
- 👤 Robert W. Humphreys
- 👤 Adrian W. Walker
- 👤 Robin J. Green
- 👤 Stephen W. Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:05
CPC Classifications
C; C11; C11D; C11D17/00; C11D17/0008; C11D17/0026; C11D3/00; C11D3/39; C11D3/3947
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
83 words
An aqueous liquid bleaching composition having a pH of from 1 to 6.5, comprising from 1 to 40% by weight of a solid, particulate, substantially water-insoluble organic peroxy acid stably suspended in a surfactant structured liquid comprising from 2 to 50% by weight of a surfactant, from 1.5 to 30% by weight of an electrolyte and the balance water, said bleaching composition having a viscosity of from 0.05 to 20 PaS measured at a shear rate of 21 sec. -1 at 25° C.
Claim 2
Dependent Claim
83 words
An aqueous liquid bleaching composition having a pH of from 1 to 6.5, comprising from 1 to 40% by weight of a solid, particulate, substantially water-insoluble organic peroxy acid stably suspended in a surfactant structured liquid comprising from 2 to 50% by weight of a surfactant, from 1.5 to 30% by weight of an electrolyte and the balance water, said bleaching composition having a viscosity of from 0.05 to 20 PaS measured at a shear rate of 21 sec. -1 at 25° C.
Claim 3
Dependent Claim
18 words
Bleaching composition according to claim 1, which comprises from 2.5 to 30% by weight of said peroxy acid.
Claim 4
Dependent Claim
28 words
Bleaching composition according to claim 1, wherein said surfactant represents from 5 to 35% by weight and said electrolyte represents 2.5 to 25% by weight of the composition.
Claim 5
Dependent Claim
19 words
Bleaching composition according to claim 1, wherein said surfactant is selected from anionic surfactants, nonionic surfactants and mixtures thereof.
Claim 6
Dependent Claim
13 words
Bleaching composition according to claim 1, wherein said peroxy acid is 1,12-diperoxydodecanedioic acid.
Claim 7
Dependent Claim
15 words
Bleaching composition according to claim 1, wherein said viscosity is from 0.05 to 1.5 PaS.
Claim 8
Dependent Claim
15 words
Bleaching composition according to claim 6, wherein said viscosity is from 0.2 to 1.0 paS.
Claim 9
Dependent Claim
28 words
An aqueous liquid bleaching composition according to claim 1 wherein said surfactant is a mixture of anionic and nonionic surfactants in the respective ratio of 10:1 to 1:10.
Claim 10
Dependent Claim
16 words
An aqueous liquid bleaching composition according to claim 8 wherein the anionic surfactant is alkylbenzene sulfonate.
Claim 11
Dependent Claim
45 words
An aqueous liquid bleaching composition according to claim 8 wherein the nonionic is selected from the group consisting of fatty acid mono- and dialkylolamides, tertiary amine oxides, ethylene oxide and/or propylene oxide condensation products with alcohols, alkylphenol, fatty acids, fatty acid amides and mixtures thereof.
Claim 12
Dependent Claim
22 words
An aqueous liquid bleaching composition according to claim 8 wherein the surfactant is a mixture of alkylbenzene sulfonate and an ethoxylated alcohol.
Claim 13
Dependent Claim
21 words
An aqueous liquid bleaching composition according to claim 1 wherein said surfactant is a mixture of at least two anionic surfactants.
Claim 14
Dependent Claim
23 words
An aqueous liquid bleaching composition according to claim 12 wherein the surfactant is a mixture of alkylbenzene sulfonate and an alkyl ether sulphate.
References Cited (Backward Citations)
US3658712A
Cited
US3956159A
Cited
US3996152A
Cited
US4017412A
Cited
JPS57137733A
Cited
EP0176124A2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-02-09 | 1990-08-11 | 1991-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-09 | 1994-08-11 | 1995-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-09 | 1998-08-11 | 1999-02-10 | $7700.00 | Window Closed / Lapsed |