US4797288A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel drug delivery system
Assignee: Intercontinental Great Brands LLC
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Filing: 1985-02-14
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Granted: 1989-01-10
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Expires: 2005-02-14
Abstract
Abstract A drug delivery system comprising a core material comprising a drug, and a hydrophobic matrix coating the core. The coating delays hydration of the drug and masks the taste of the drug. The coating comprises an emulsifier, an edible fatty acid or wax and a glyceride. The delivery system can be incorporated into various food products, pharmaceutical preparations and proprietary products.
Inventors
- 👤 Shri C. Sharma
- 👤 James J. Shaw
- 👤 Robert K. Yang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:34
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/14; A61K9/16; A61K9/1605; A61K9/1617; A61K9/48; A61K9/50; A61K9/5005; A61K9/5015; A23; A23V; A23V2002/00
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
199 words
A dry particulate drug delivery system designed to be chewed or swallowed whole comprising: (A) cholestyramine in an amount of about 1% to about 75% and (B) a hydrophobic matrix comprising (i) about 0.5% to about 20% by weight of an emulsifier; and (ii) about 61% to about 95% by weight of an edible material having a melting point in the range of about 25° C. to about 100° C. selected from the group consisting of (a) fatty acids having an iodine value of about 1 to about 10, (b) natural waxes, (c) synthetic waxes and (d) mixtures thereof; and (iii) at least one glyceride, wherein the cholestyramine and hydrophobic matrix form an agglomerate, and (c) a coat effective to delay hydration until ingested comprising about 200% to baout 400% by weight of the agglomerate an edible material having a melting point in the range of about 25° C. to about 100° C. selected from the group consisting of (a) fatty acids having an iodine value of about 1 to about 10, (b) natural waxes, (c) synthetic waxes and (d) mixtures thereof; wherein the coat forms a protective barrier effective to prevent unpleasant taste perception for the cholestyramine agglomerate.
Claim 2
Dependent Claim
199 words
A dry particulate drug delivery system designed to be chewed or swallowed whole comprising: (A) cholestyramine in an amount of about 1% to about 75% and (B) a hydrophobic matrix comprising (i) about 0.5% to about 20% by weight of an emulsifier; and (ii) about 61% to about 95% by weight of an edible material having a melting point in the range of about 25° C. to about 100° C. selected from the group consisting of (a) fatty acids having an iodine value of about 1 to about 10, (b) natural waxes, (c) synthetic waxes and (d) mixtures thereof; and (iii) at least one glyceride, wherein the cholestyramine and hydrophobic matrix form an agglomerate, and (c) a coat effective to delay hydration until ingested comprising about 200% to baout 400% by weight of the agglomerate an edible material having a melting point in the range of about 25° C. to about 100° C. selected from the group consisting of (a) fatty acids having an iodine value of about 1 to about 10, (b) natural waxes, (c) synthetic waxes and (d) mixtures thereof; wherein the coat forms a protective barrier effective to prevent unpleasant taste perception for the cholestyramine agglomerate.
Claim 3
Dependent Claim
11 words
The delivery system of claim 1 wherein the emulsifier is lecithin.
Claim 4
Dependent Claim
46 words
The delivery system of claim 1 wherein the fatty acid is selected from the group consisting of hydrogenated palm oil, hydrogenated palm kernel oil, hydrogenated peanut oil, hydrogenated rapeseed oil, hydrogenated rice bran oil, hydrogenated soybean oil, hydrogenated cottonseed oil, hydrogenated sunflower oil and mixtures thereof.
Claim 5
Dependent Claim
26 words
The delivery system of claim 3 wherein the fatty acid is present in amounts of about 61% to about 95% by weight of the delivery system.
Claim 6
Dependent Claim
30 words
The delivery system of claim 3 wherein the fatty acid is refined hydrogenated palm oil present in amounts of about 63% to about 90% by weight of the delivery system.
Claim 7
Dependent Claim
25 words
The delivery system of claim 1 wherein the glyceride is present in amounts of about 0.5% to about 20% by weight of the delivery system.
Claim 8
Dependent Claim
28 words
The delivery system of claim 6 wherein the glyceride is a distilled monoglyceride present in amounts of about 1% to about 3% by weight of the delivery system.
Claim 9
Dependent Claim
20 words
The delivery system of claim 6 wherein the emulsifier is lecithin, present in amounts of about 0.5% to about 9%.
Claim 10
Dependent Claim
21 words
The delivery system of claim 3 having a melting point in the range of about 25° C. to about 90° C.
Claim 11
Dependent Claim
20 words
The delivery system of claim 1 having a particle size of about 200 to about 30 U.S. Standard mesh size.
Claim 12
Dependent Claim
126 words
A dry particulate composite having a substantially hydrophobic exterior designed to be chewed or swallowed whole comprising (A) an agglomerated mixture of about 1% to about 75% of cholestyramine and a matrix wherein the matrix comprises: (i) about 0.5% to about 20% fat soluble lecithin; (ii) about 61% to about 90% of an edible material having a melting point in the range of about 25° C. to about 100° C. selected from the group consisting of (a) a fatty acid having an iodine value of about 1 to about 10; (b) natural waxes; (c) synthetic waxes; (d) and mixtures thereof; (iii) about 0.5% to about 30% of a glyceride; said composite having a melting point in the range of about 20° C. to about 90° C.
Claim 13
Dependent Claim
126 words
A dry particulate composite having a substantially hydrophobic exterior designed to be chewed or swallowed whole comprising (A) an agglomerated mixture of about 1% to about 75% of cholestyramine and a matrix wherein the matrix comprises: (i) about 0.5% to about 20% fat soluble lecithin; (ii) about 61% to about 90% of an edible material having a melting point in the range of about 25° C. to about 100° C. selected from the group consisting of (a) a fatty acid having an iodine value of about 1 to about 10; (b) natural waxes; (c) synthetic waxes; (d) and mixtures thereof; (iii) about 0.5% to about 30% of a glyceride; said composite having a melting point in the range of about 20° C. to about 90° C.
Claim 14
Dependent Claim
10 words
The composite of claim 11 contained in a confectionery product.
Claim 15
Dependent Claim
11 words
The composite of claim 11 contained in a chewing gum product.
Claim 16
Dependent Claim
10 words
The composite of claim 11 contained in a pharmaceutical preparation.
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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) | 1992-01-10 | 1992-07-11 | 1993-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-10 | 1996-07-11 | 1997-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-10 | 2000-07-11 | 2001-01-10 | $7700.00 | Window Closed / Lapsed |