US4500546A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Suspensions containing microfibrillated cellulose
Assignee: Rayonier Inc
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Filing: 1982-11-15
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Granted: 1985-02-19
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Expires: 2002-11-15
Abstract
Abstract A suspension of a finely divided material in a liquid suspending medium which swells cellulose, the suspension containing microfibrillated cellulose in an amount sufficient to produce a stable, homogeneous suspension. The microfibrillated cellulose, a form of cellulose having a very large available surface area per unit of weight, acts to confer, among other benefits, greater stability on the suspension. The suspensions are useful in a variety of end use products including foods, cosmetics, pharmaceuticals, paints and drilling muds.
Inventors
- 👤 Albin F. Turbak
- 👤 Fred W. Snyder
- 👤 Karen R. Sandberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:11
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/03; C08J3/05; A; A61; A61K; A61K8/00; A61K8/02; A61K8/0241; A61K8/027; A61K8/18; A61K8/30; A61K8/33; A61K8/34; A61K8/345; A61K8/72; A61K8/73; A61K8/731; A61Q; A61Q19/00; A61Q19/008; C08L; C08L1/00; C08L1/02; C09; C09K; C09K8/00; C09K8/02; C09K8/04; C09K8/14; C09K8/18; C09K8/20; C09K8/206; D; D21; D21C; D21C9/00; D21C9/001; C08J2301/00; C08J2301/02
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
101 words
A cosmetic base comprising a suspension of a finely divided cosmetic material in a liquid suspending medium which swells cellulose, said suspension containing microfibrillated cellulose in an amount ranging from 0.25% to an amount such that it is present as the major ingredient of the suspension, said proportions being based on the weight of cellulose solids present as microfibrillated cellulose as compared to the total weight of the suspension, said amount being sufficient to produce a stable, homogeneous suspension, said microfibrillated cellulose having a settling volume after 60 minutes in a 0.5% by weight suspension in water of greater than 60%.
Claim 2
Dependent Claim
101 words
A cosmetic base comprising a suspension of a finely divided cosmetic material in a liquid suspending medium which swells cellulose, said suspension containing microfibrillated cellulose in an amount ranging from 0.25% to an amount such that it is present as the major ingredient of the suspension, said proportions being based on the weight of cellulose solids present as microfibrillated cellulose as compared to the total weight of the suspension, said amount being sufficient to produce a stable, homogeneous suspension, said microfibrillated cellulose having a settling volume after 60 minutes in a 0.5% by weight suspension in water of greater than 60%.
Claim 3
Dependent Claim
14 words
The cosmetic base of claim 1 in which the liquid suspending medium is glycerine.
Claim 4
Dependent Claim
15 words
The cosmetic base of claim 1 in which the liquid suspending medium is propylene glycol.
Claim 5
Dependent Claim
14 words
The cosmetic base of claim 1 in which the liquid suspending medium is water.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-02-19 | 1988-08-20 | 1989-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-19 | 1992-08-20 | 1993-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-19 | 1996-08-20 | 1997-02-19 | $7700.00 | Window Closed / Lapsed |