Patent US4427558A successfully refreshed from Google Patents.
US4427558A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fabric conditioning materials
Assignee: Lever Brothers Co
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Filing: 1982-04-26
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Granted: 1984-01-24
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Expires: 2002-04-26
Abstract
Abstract Particles for softening fabrics either in a wash liquor or in the rinse, are formed from a liquid mixture comprising water, a cationic material, such as a quaternary ammonium compound, urea and a calcium soap. The particles are formed from the liquid mixture by cooling to a solid and then grinding or by spray cooling. Weathering to form a crisp free flowing powder is optional. The presence of water in the liquid mixture improves the processing of the particles.
Inventors
- 👤 John G. David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:41
CPC Classifications
C; C11; C11D; C11D9/00; C11D9/002; C11D3/00; C11D3/0005; C11D3/001; C11D3/16; C11D3/26; C11D3/32; C11D3/323
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
121 words
A method of producing fabric softening particles characterised by the steps of (i) forming a liquid mixture comprising: (A) from about 4% to about 80% by weight of a cationic fabric conditioning material; (B) from about 10% to about 90% by weight of urea; (C) from about 2% to about 50% by weight of water; and (D) from about 1% to about 50% by weight of an alkaline earth metal salt of a fatty acid having 8-30 carbon atoms, the weight ratio of fatty acid salt to cationic fabric conditioning material being between about 0.25:1 and about 0.5:1; and (iii) transforming the liquid mixture so formed into solid particles having a particle size of from about 0.1 to about 2000 microns.
Claim 2
Independent Claim
121 words
A method of producing fabric softening particles characterised by the steps of (i) forming a liquid mixture comprising: (A) from about 4% to about 80% by weight of a cationic fabric conditioning material; (B) from about 10% to about 90% by weight of urea; (C) from about 2% to about 50% by weight of water; and (D) from about 1% to about 50% by weight of an alkaline earth metal salt of a fatty acid having 8-30 carbon atoms, the weight ratio of fatty acid salt to cationic fabric conditioning material being between about 0.25:1 and about 0.5:1; and (iii) transforming the liquid mixture so formed into solid particles having a particle size of from about 0.1 to about 2000 microns.
Claim 3
Dependent Claim
19 words
A method according to claim 1, characterised in that the liquid mixture additionally contains a nonionic surface active agent.
Claim 4
Dependent Claim
19 words
Fabric softening particles characterised in that they have been prepared by a method according to claim 1 or 2.
Claim 5
Dependent Claim
20 words
Fabric softening particles according to claim 3, characterised by containing from about 2% to about 30% by weight of water.
Claim 6
Dependent Claim
24 words
A detergent compatible wash additive product characterized in that it contains at least about 2.0% by weight of the particles claimed in claim 3.
Claim 7
Dependent Claim
44 words
A detergent composition comprising from about 5% to about 85% by weight of a water-soluble detersive surfactant, with or without a detergency builder, characterized in that is further contains from about 0.5% to about 30% by weight of the particles claimed in claim 3.
Claim 8
Dependent Claim
19 words
A rinse conditioner characterized by comprising at least about 1% by weight of the particles claimed in claim 3.
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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) | 1987-01-23 | 1987-07-25 | 1988-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-23 | 1991-07-25 | 1992-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-23 | 1995-07-25 | 1996-01-24 | $7700.00 | Window Closed / Lapsed |