US5023108A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aqueous dispersions of waxes and lipids for pharmaceutical coating
Assignee: Research Corp
•
Filing: 1987-09-08
•
Granted: 1991-06-11
•
Expires: 2007-09-08
Abstract
Abstract This invention relates to the coating of pharmaceutically useful solids with an emulsion comprising a wax/lipid, an emulsifying agent and water, which emulsion can be spray dried to form a powder which can subsequently be dispersed in water and coated onto the surface of medicaments to form a protective, enteric and/or controlled release of drug-containing granules, pellets and tablets.
Inventors
- 👤 Suresh C. Bagaria
- 👤 Nicholas G. Lordi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:56
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/48; A61K9/50; A61K9/5073; A61K9/5078; A23; A23P; A23P20/00; A23P20/10; A23P20/11; A61K9/5005; A61K9/5015
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
53 words
A process for spray-coating medicaments or foods which comprises spraying onto the surface of the medicament an aqueous dispersion of a powder, said powder having been formed by spray drying an emulsion to consisting essentially of a member selected from the group wax, lipid and a mixture thereof, an emulsifying agent and water.
Claim 2
Dependent Claim
53 words
A process for spray-coating medicaments or foods which comprises spraying onto the surface of the medicament an aqueous dispersion of a powder, said powder having been formed by spray drying an emulsion to consisting essentially of a member selected from the group wax, lipid and a mixture thereof, an emulsifying agent and water.
Claim 3
Dependent Claim
14 words
The process according to claim 1 wherein the member is partially hydrogenated cottonseed oil.
Claim 4
Dependent Claim
12 words
The process according to claim 1 wherein the wax is carnuba wax.
Claim 5
Dependent Claim
13 words
The process according to claim 1 wherein the wax is castor wax/cutina HR.
Claim 6
Dependent Claim
13 words
The process according to claim 1 wherein the wax is Hoechst wax E.
Claim 7
Dependent Claim
12 words
The process according to claim 1 wherein the wax is paraffin wax.
Claim 8
Dependent Claim
12 words
The process according to claim 1 wherein the wax is bees wax.
Claim 9
Dependent Claim
12 words
The process according to claim 1 wherein the wax is bees wax.
Claim 10
Dependent Claim
18 words
The process according to claim 1 wherein the wax is a mixture of carnuba wax and bees wax.
Claim 11
Dependent Claim
20 words
The process according to claim 1 wherein the wax is mixture of Hoechst wax E, bees wax and paraffin wax.
Claim 12
Dependent Claim
12 words
The process according to claim 1 wherein the lipid is glyceryl monostearate.
Claim 13
Dependent Claim
18 words
The process according to claim 1 wherein the member is a mixture of castor wax and glyceryl monostearate.
References Cited (Backward Citations)
US2800463A
Cited
US3438797A
Cited
US3644130A
Cited
US3935326A
Cited
US4002706A
Cited
US3981957A
Cited
US4508703A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-06-10 | 1994-12-10 | 1995-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-06-10 | 1998-12-10 | 1999-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-06-10 | 2002-12-10 | 2003-06-11 | $7700.00 | Window Closed / Lapsed |