US5876750A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Effective therapy for epilepsies
Assignee: Alza Corp
•
Filing: 1997-06-09
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Granted: 1999-03-02
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Expires: 2017-06-09
Abstract
Abstract A dosage form is disclosed for delivering an antiepileptic drug, which dosage form comprises a laminated wall for maintaining the integrity of the dosage form and of the antiepileptic drug.
Inventors
- 👤 Frank Jao
- 👤 Patrick S.-L. Wong
- 👤 Evangeline Cruz
- 👤 Eduardo C. Sy
- 👤 Anthony L. Kuczynski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:08
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/20; A61K31/00; A61K31/16; A61K31/165; A61K31/17; A61K31/185; A61K31/19; A61K31/195; A61K31/21; A61K31/27; A61K31/33; A61K31/395; A61K31/40; A61K31/4015; A61K31/41; A61K31/4164; A61K31/4166; A61K31/42; A61K31/421; A61K31/425; A61K31/426; A61K31/435; A61K31/44; A61K31/445; A61K31/4523; A61K31/4535; A61K31/495; A61K31/505; A61K31/513; A61K31/515; A61K31/53; A61K31/54; A61K31/55; A61K31/551; A61K31/5513; A61K31/63; A61K31/635; A61K45/00; A61K45/06; A61K9/0002; A61K9/0004
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
129 words
A dosage form for orally administering phenytoin to a patient in need of an antiepileptic drug, wherein the dosage form comprises; (a) a dosage amount of phenytoin in the dosage form; (b) a composition comprising a member selected from the group consisting of a polyalkylene and a carboxyalkylcellulose in the dosage form; (c) an internal coat that surrounds at least the dosage amount of phenytoin for aiding in maintaining the integrity of the dosage form and for protecting the phenytoin in the dosage form; (d) an external coat that contacts the internal coat and surrounds and defines the dosage form for use in antiepileptic therapy; and, (e) an exit in the dosage form for releasing the phenytoin from the dosage form to the patient in need of antiepileptic therapy.
Claim 2
Dependent Claim
129 words
A dosage form for orally administering phenytoin to a patient in need of an antiepileptic drug, wherein the dosage form comprises; (a) a dosage amount of phenytoin in the dosage form; (b) a composition comprising a member selected from the group consisting of a polyalkylene and a carboxyalkylcellulose in the dosage form; (c) an internal coat that surrounds at least the dosage amount of phenytoin for aiding in maintaining the integrity of the dosage form and for protecting the phenytoin in the dosage form; (d) an external coat that contacts the internal coat and surrounds and defines the dosage form for use in antiepileptic therapy; and, (e) an exit in the dosage form for releasing the phenytoin from the dosage form to the patient in need of antiepileptic therapy.
Claim 3
Dependent Claim
58 words
The dosage form for administering the antiepileptic drug according to claim 1, wherein the phenytoin is replaced by an antiepileptic drug selected from the group consisting of sodium phenytoin, potassium, phenytoin, mephenytoin, phenobarbital, primidone, carbamazepine, ethosuximide, methsuximide, phensuximide, trimethadione, clonazepam, clorazepate, phenacemide, paramethadione, primaclone, clobazam, felbamate, flunarizine, lamotrigine, progabide, virgabatim, eterobarb, gabapentin, oxcarbazepine, ralitoline, tiagobine, sulthiame and tioridone.
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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) | 2002-03-01 | 2002-08-31 | 2003-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-03-01 | 2006-08-31 | 2007-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-03-01 | 2010-08-31 | 2011-03-02 | $7700.00 | Window Closed / Lapsed |