US4897269A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Administration of drugs with multiphase liposomal delivery system
Assignee: LIPODERM PHARMACEUTICALS Inc
•
Filing: 1988-06-27
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Granted: 1990-01-30
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Expires: 2008-06-27
Abstract
Abstract A method for administering a slightly water soluble biologically active compound by topically applying a pharmaceutical composition containing: (a) lipid vesicles with a biologically active compound captured therein; (b) a saturated solution of the biologically active compound; and (c) the biologically active compound in solid form. Optionally this composition is dispersed in a hydrocolloid gel.
Inventors
- 👤 Michael Mezei
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:32
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/10; A61K9/127; A61K31/00; A61K31/33; A61K31/395; A61K31/41; A61K31/415; A61K31/495; A61K31/505; A61K9/1277; Y; Y10; Y10S; Y10S436/00; Y10S436/829; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2984
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
50 words
A method for administering a slightly water soluble biologically active compound comprising: topically applying a pharmaceutical composition comprising: (a) multilamellar lipid vesicles with a slightly water soluble biologically active compound captured therein; (b) a saturated solution of the biologically active compound; and (c) the biologically active compound in solid form.
Claim 2
Independent Claim
50 words
A method for administering a slightly water soluble biologically active compound comprising: topically applying a pharmaceutical composition comprising: (a) multilamellar lipid vesicles with a slightly water soluble biologically active compound captured therein; (b) a saturated solution of the biologically active compound; and (c) the biologically active compound in solid form.
Claim 3
Dependent Claim
10 words
A method of claim 1, wherein the compound is minoxidil.
Claim 4
Dependent Claim
14 words
A method of claim 1, wherein the compound is econazole nitrate or econazole base.
Claim 5
Dependent Claim
14 words
A method of claim 1, wherein the composition is dispersed in a hydrocolloid gel.
Claim 6
Dependent Claim
10 words
A method of claim 4, wherein the compound is minoxidil.
Claim 7
Dependent Claim
14 words
A method of claim 4, wherein the compound is econazole nitrate or econazole base.
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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) | 1993-01-29 | 1993-07-31 | 1994-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-29 | 1997-07-31 | 1998-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-29 | 2001-07-31 | 2002-01-30 | $7700.00 | Window Closed / Lapsed |