Patent US4397755A successfully refreshed from Google Patents.
US4397755A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stable liquid detergent suspensions
Assignee: Lever Brothers Co
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Filing: 1981-10-15
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Granted: 1983-08-09
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Expires: 2001-10-15
Abstract
Abstract The invention pertains to liquid media, in which particulate materials can be stably suspended, e.g. liquid abrasive cleaning compositions. These products can suffer from a shear-stability problem, and according to the invention this problem can be overcome by the inclusion of a low level, e.g. 0.001-0.2% of a hectorite clay.
Inventors
- 👤 John M. Brierley
- 👤 Melvin Scott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:35
CPC Classifications
C; C11; C11D; C11D17/00; C11D17/0008; C11D17/0013; C11D3/00; C11D3/02; C11D3/12; C11D3/124; C11D3/1246; C11D3/1253; C11D3/1266
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
72 words
A liquid medium, capable per se of stably suspending under high extensional shear rates non-colloidal undissolved particulate material, comprising an aqueous medium in which is present: (a) from 0.2 to 70% of non-colloidal undissolved particulate material; (b) from 0.5 to 20% of anionic detergent material; (c) from 0.5 to 25% of a water-soluble electrolyte; and (d) from 0.001 to 0.15% of a hectorite clay, all percentages being calculated on the final product.
Claim 2
Dependent Claim
72 words
A liquid medium, capable per se of stably suspending under high extensional shear rates non-colloidal undissolved particulate material, comprising an aqueous medium in which is present: (a) from 0.2 to 70% of non-colloidal undissolved particulate material; (b) from 0.5 to 20% of anionic detergent material; (c) from 0.5 to 25% of a water-soluble electrolyte; and (d) from 0.001 to 0.15% of a hectorite clay, all percentages being calculated on the final product.
Claim 3
Dependent Claim
22 words
A liquid medium according to claim 1, in which the amount of the hectorite clay ranges from 0.01 to 0.2% by weight.
Claim 4
Dependent Claim
18 words
A liquid medium according to claim 1, further comprising from 0.5 to 15% of a nonionic detergent material.
Claim 5
Dependent Claim
20 words
A liquid detergent composition, comprising a liquid medium according to claim 1 and non-colloidal, undissolved particulate material stably suspended therein.
Claim 6
Dependent Claim
82 words
A liquid detergent composition according to claim 4 comprising: (a) from 0.5 to 20% by weight of one or more anionic detergents; (b) from 0.5 to 15% by weight of one or more nonionic detergents; (c) from 0.5 to 15% by weight of one or more water-soluble electrolytes; (d) from 0.2 to 70% of one or more types of particulate abrasive materials; (e) from 0.001 to 0.15% by weight of a hectorite clay; and (f) the balance consisting of an aqueous medium.
Claim 7
Dependent Claim
70 words
A composition according to claim 5, comprising: (a) from 3 to 15% by weight of the anionic detergent; (b) from 2-12% by weight of the nonionic detergent; (c) from 0.5 to 10% by weight of the water-soluble electrolyte; (d) from 5 to 55% by weight of the particulate abrasive material; (e) from 0.01 to 0.15% by weight of a hectorite clay; and (f) the balance consisting of an aqueous medium.
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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) | 1986-08-08 | 1987-02-07 | 1987-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-08 | 1991-02-07 | 1991-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-08 | 1995-02-07 | 1995-08-09 | $7700.00 | Window Closed / Lapsed |