US4600645A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for treating dosage forms
Assignee: Warner Lambert Co LLC
•
Filing: 1985-01-31
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Granted: 1986-07-15
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Expires: 2005-01-31
Abstract
Abstract The problems of tackiness and long curing times usually associated with the treatment of dosage forms are overcome via the use of a new curing process. That process involves: (1) coating a drug with a sustained release formulation, (2) immediately coating with a water-soluble overcoat, (3) drying, and (4) recovering the coated dosage form.
Inventors
- 👤 Isaac Ghebre-Sellassie
- 👤 Robert H. Gordon
- 👤 Michael R. Harris
- 👤 Russell U. Nesbitt, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:59
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/48; A61K9/50; A61K9/5073; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2998
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
55 words
A curing process for coated pharmaceutical dosage forms comprising the steps of: (1) coating a drug-containing substrate with a sustained release formulation, (2) immediately coating the product of step (1) with a water-soluble overcoat, (3) drying the product of step (2) for about 15 to about 60 minutes, and (4) recovering the coated dosage form.
Claim 2
Dependent Claim
55 words
A curing process for coated pharmaceutical dosage forms comprising the steps of: (1) coating a drug-containing substrate with a sustained release formulation, (2) immediately coating the product of step (1) with a water-soluble overcoat, (3) drying the product of step (2) for about 15 to about 60 minutes, and (4) recovering the coated dosage form.
Claim 3
Dependent Claim
21 words
The process of claim 1 wherein the formulation employed in step (1) contains a water-dispersible polymer, a filler and a plasticizer.
Claim 4
Dependent Claim
12 words
The process of claim 2 wherein the overcoat contains a water-soluble polymer.
Claim 5
Dependent Claim
12 words
The process of claim 3 wherein the drug-containing substrate is a pellet.
Claim 6
Dependent Claim
29 words
The process of claim 4 wherein steps (1) and (2) are carried out in the same device without removal of the product of step (1) prior to step (2).
Claim 7
Dependent Claim
10 words
The dosage form produced by the process of claim 3.
Claim 8
Dependent Claim
10 words
The dosage form produced by the process of claim 2.
Claim 9
Dependent Claim
10 words
The dosage form produced by the process of claim 4.
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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) | 1989-07-14 | 1990-01-13 | 1990-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-14 | 1994-01-13 | 1994-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-14 | 1998-01-13 | 1998-07-15 | $7700.00 | Window Closed / Lapsed |