Patent US2634696A successfully refreshed from Google Patents.
Patent US5135740A successfully refreshed from Google Patents.
US5135740A
Expired / Lapsed
US
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Porous particles in preparations involving immiscible phases
Assignee: Amcol International Corp
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Filing: 1989-10-02
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Granted: 1992-08-04
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Expires: 2009-10-02
Abstract
Abstract Immiscible phases, particularly polar and non-polar liquids, semi-solids or solids, are combined in a composition where one is finely dispersed throughout the other without reliance upon emulsifying agents to either create or stabilize the dispersion. The composition is formed by placing the discontinuous phase in the pores of solid inert porous particles, in which the pores are in the form of an interconnected network open to the exterior of the particles to provide interfacial contact with the continuous phase. The particles are then dispersed in the continuous phase. The concept is applicable to oil-in-water and water-in-oil type dispersions, and the disadvantages and shortcomings of emulsifying agents are entirely avoided.
Inventors
- 👤 Martin Katz
- 👤 Chung-Heng Cheng
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:30
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/28; A; A61; A61K; A61K8/00; A61K8/02; A61K8/0241; A61K8/0283; A61K9/00; A61K9/10; A61K9/14; A61K9/16; A61K9/1605; A61K9/1629; A61K9/1635; A61Q; A61Q19/00; A61K2800/00; A61K2800/40; A61K2800/60; A61K2800/65; A61K2800/654; A61Q1/00; A61Q1/02; A61Q1/04; A61Q1/06
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
74 words
A composition comprising solid particles dispersed in a solid, semi-solid or liquid continuous phase, said solid particles each containing a substantially continuous network of pores open to the exterior of said particles with a substance substantially immiscible with said continuous phase retained in said pores, said substance and said continuous phase each being inert with respect to said solid particles and each being free of catalysts and unreacted species to form said solid particles.
Claim 2
Dependent Claim
74 words
A composition comprising solid particles dispersed in a solid, semi-solid or liquid continuous phase, said solid particles each containing a substantially continuous network of pores open to the exterior of said particles with a substance substantially immiscible with said continuous phase retained in said pores, said substance and said continuous phase each being inert with respect to said solid particles and each being free of catalysts and unreacted species to form said solid particles.
Claim 3
Dependent Claim
24 words
A composition in accordance with claim 1 in which said solid particles have an average diameter of about one micron to about 100 microns.
Claim 4
Dependent Claim
24 words
A composition in accordance with claim 1 in which said solid particles have an average diameter of about 10 microns to about 40 microns.
Claim 5
Dependent Claim
25 words
A composition in accordance with claim 1 in which said solid particles have a total pore volume of about 0.01 cc/g to about 4.0 cc/g.
Claim 6
Dependent Claim
25 words
A composition in accordance with claim 1 in which said solid particles have a total pore volume of about 0.1 cc/g to about 2.0 cc/g.
Claim 7
Dependent Claim
28 words
A composition in accordance with claim 1 in which said solid particles have a surface area of about 1 m 2 /g to about 500 m 2 /g.
Claim 8
Dependent Claim
28 words
A composition in accordance with claim 1 in which said solid particles have a surface area of about 20 m 2 /g to about 200 m 2 /g.
Claim 9
Dependent Claim
25 words
A composition in accordance with claim 1 in which said solid particles have an average pore diameter of about 0.001 micron to about 3.0 microns.
Claim 10
Dependent Claim
25 words
A composition in accordance with claim 1 in which said solid particles have an average pore diameter of about 0.003 micron to about 1.0 micron.
Claim 11
Dependent Claim
18 words
A composition in accordance with claim 1 in which said solid particles are formed of a crosslinked polymer.
Claim 12
Dependent Claim
19 words
A composition in accordance with claim 10 in which said cross-linked polymer is a copolymer of styrene and divinylbenzene.
Claim 13
Dependent Claim
22 words
A composition in accordance with claim 10 in which said cross-linked polymer is a copolymer of methyl methacrylate and ethylene glycol dimethacrylate.
Claim 14
Dependent Claim
27 words
A composition in accordance with claim 1 in which said solid particles and said liquid comprise from about 1% to about 50% by volume of said dispersion.
Claim 15
Dependent Claim
27 words
A composition in accordance with claim 1 in which said solid particles and said liquid comprise from about 5% to about 25% by volume of said dispersion.
Claim 16
Dependent Claim
14 words
A composition in accordance with claim 1 in which said substance is a solid.
Claim 17
Dependent Claim
14 words
A composition in accordance with claim 1 in which said substance is a semi-solid.
Claim 18
Dependent Claim
14 words
A composition in accordance with claim 1 in which said substance is a liquid.
Claim 19
Dependent Claim
58 words
A composition comprising solid particles immersed in a solid continuous phase, said solid particles each containing a substantially continuous network of pores open to the exterior of said particles with a substance substantially immiscible with said solid continuous phase retained in said pores, said substance and said continuous phase each being inert with respect to said solid particles.
Claim 20
Dependent Claim
58 words
A composition comprising solid particles immersed in a solid continuous phase, said solid particles each containing a substantially continuous network of pores open to the exterior of said particles with a substance substantially immiscible with said solid continuous phase retained in said pores, said substance and said continuous phase each being inert with respect to said solid particles.
Claim 21
Dependent Claim
58 words
A composition comprising solid particles immersed in a semi-solid continuous phase, said solid particles each containing a substantially continuous network of pores open to the exterior of said particles with a substance substantially immiscible with said semi-solid continuous phase retained in said pores, said substance and said continuous phase each being inert with respect to said solid particles.
Claim 22
Dependent Claim
58 words
A composition comprising solid particles immersed in a semi-solid continuous phase, said solid particles each containing a substantially continuous network of pores open to the exterior of said particles with a substance substantially immiscible with said semi-solid continuous phase retained in said pores, said substance and said continuous phase each being inert with respect to said solid particles.
Claim 23
Dependent Claim
68 words
A composition comprising solid particles immersed in a liquid continuous phase selected from the group consisting of oils, lotions and creams, said solid particles each containing a substantially continuous network of pores open to the exterior of said particles with a substance substantially immiscible with said liquid continuous phase retained in said pores, said substance and said continuous phase each being inert with respect to said solid particles.
Claim 24
Dependent Claim
68 words
A composition comprising solid particles immersed in a liquid continuous phase selected from the group consisting of oils, lotions and creams, said solid particles each containing a substantially continuous network of pores open to the exterior of said particles with a substance substantially immiscible with said liquid continuous phase retained in said pores, said substance and said continuous phase each being inert with respect to said solid particles.
Claim 25
Dependent Claim
27 words
A composition in accordance with claim 1 in which said substance is a substantially non-polar hydrophobic liquid and said continuous phase is a substantially polar hydrophilic liquid.
Claim 26
Dependent Claim
18 words
A composition in accordance with claim 21 in which said substantially polar hydrophilic liquid is an aqueous liquid.
Claim 27
Dependent Claim
34 words
A composition in accordance with claim 22 in which said aqueous liquid is comprised of water combined with at least one member selected from the group consisting of volatilization-enhancing agents. humectants and thickening agents.
Claim 28
Dependent Claim
35 words
A composition in accordance with claim 21 in which said substantially non-polar hydrophobic liquid is a member selected from the group consisting of emollients, moisturizers, lubricants, sunscreens, insect repellents, vitamins, fragrances, drugs, deodorants and pigments.
Claim 29
Dependent Claim
27 words
A composition in accordance with claim 1 in which said substance is a substantially polar hydrophilic liquid and said continuous phase is a substantially non-polar hydrophobic liquid.
Claim 30
Dependent Claim
17 words
A composition in accordance with claim 25 in which said substantially polar hydrophilic liquid is a humectant.
Claim 31
Dependent Claim
24 words
A composition in accordance with claim 26 in which said humectant is a member selected from the group consisting of sugars, glycols and polyols.
Claim 32
Dependent Claim
20 words
A composition in accordance with claim 25 in which said substantially polar hydrophilic liquid is comprised of a polar solvent.
Claim 33
Dependent Claim
14 words
A composition in accordance with claim 25 in which said substantially polar hydrophilic liquid
Claim 34
Dependent Claim
41 words
A composition in accordance with claim 25 in which said substantially polar hydrophilic liquid is a solution of a corticosteroid in a polar solvent selected from the group consisting of propylene glycol and propylene carbonate, and said continuous phase is petrolatum.
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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) | 1995-08-04 | 1996-02-03 | 1996-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-08-04 | 2000-02-03 | 2000-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-08-04 | 2004-02-03 | 2004-08-04 | $7700.00 | Window Closed / Lapsed |