Patent US4973422A successfully refreshed from Google Patents.
US4973422A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Perfume particles for use in cleaning and conditioning compositions
Assignee: Procter and Gamble Co
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Filing: 1989-12-15
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Granted: 1990-11-27
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Expires: 2009-12-15
Abstract
Abstract Perfume particles are disclosed comprising perfume dispersed within certain water-insoluble polymeric carrier materials. Cleaning and conditioning compositions comprising these perfume particles are also disclosed. The perfume particles allow for preservation and protection of perfumes which are susceptible to degradation or loss in storage and in harsh cleaning conditions. The particles further allow for efficient delivery of a large variety of perfume types to fabrics or other surfaces.
Inventors
- 👤 Diane Grob Schmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:28
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/50; C11D3/502; C11D3/505
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
156 words
A liquid laundry detergent composition, comprising: (a) from about 10% to about 40% of a surfactant selected from the group consisting of anionic, nonionic, zwitterionic, ampholytic, cationic surfactants, and mixtures thereof; (b) from about 5% to about 50% of a detergency builder material; and (c) perfume particles having an average size of less than about 350 microns which comprise from about 5% to about 70% of a perfume dispersed in from about 30% to about 95% of a water-insoluble polymeric carrier material having a molecular weight of from about 100 to about 30,000, a melting point of from about 37° C. to about 190° C., and a hardness value of from about 0.1 to about 15, said perfume particles comprising from about 5% to about 50% of a pH-sensitive material coating the outside surface of the particle, which pH sensitive coating remains intact in one pH environment, which occurs when the composition is diluted for use.
Claim 2
Dependent Claim
156 words
A liquid laundry detergent composition, comprising: (a) from about 10% to about 40% of a surfactant selected from the group consisting of anionic, nonionic, zwitterionic, ampholytic, cationic surfactants, and mixtures thereof; (b) from about 5% to about 50% of a detergency builder material; and (c) perfume particles having an average size of less than about 350 microns which comprise from about 5% to about 70% of a perfume dispersed in from about 30% to about 95% of a water-insoluble polymeric carrier material having a molecular weight of from about 100 to about 30,000, a melting point of from about 37° C. to about 190° C., and a hardness value of from about 0.1 to about 15, said perfume particles comprising from about 5% to about 50% of a pH-sensitive material coating the outside surface of the particle, which pH sensitive coating remains intact in one pH environment, which occurs when the composition is diluted for use.
Claim 3
Dependent Claim
25 words
The particles of claim 1 wherein the pH-sensitive material is selected from the group consisting of acrylic resins, cellulose acetate phthalate and cellulose acetate trimellitiate.
Claim 4
Dependent Claim
27 words
The particles of claim 2 wherein the pH-sensitive material additionally comprises from about 0.5% to about 10%, by weight of the perfume particles, of a plasticizer material.
Claim 5
Dependent Claim
23 words
The particles of claim 3 wherein the plasticizer material is selected from the group consisting of diethyl phthalate, tributyl citrate, and acetyltributyl citrate.
References Cited (Backward Citations)
US4906488A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-11-26 | 1994-05-28 | 1994-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-11-26 | 1998-05-28 | 1998-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-11-26 | 2002-05-28 | 2002-11-27 | $7700.00 | Window Closed / Lapsed |