US4666919A
Expired / Lapsed
US
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Stabilized pharmaceutical composition containing an isocarbostyril derivative
Assignee: Nisshin Seifun Group Inc
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Filing: 1985-07-25
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Granted: 1987-05-19
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Expires: 2005-07-25
Abstract
Abstract A stabilized pharmaceutical composition containing 4-(3-tert.-butylamino-2-hydroxy)propoxy-2-methylisocarbostyril or an acid addition salt thereof as the active ingredient is now provided, in which the active ingredient compound is stabilized by addition of at least one of stabilizing agents selected from magnesium silicate, magnesium oxide, hydrotalcite and sodium hydrogen carbonate.
Inventors
- 👤 Masao Ueno
- 👤 Hironori Kubota
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:24
CPC Classifications
A; A61; A61K; A61K31/00; A61K31/33; A61K31/395; A61K31/435; A61K31/47; A61K47/00; A61K47/02; A61P; A61P9/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
63 words
A stabilized pharmaceutical composition in the form of a solid preparation which comprises 4-(3-tert.-butylamino-2-hydroxy)propoxy-2-methylisocarbostyril or a pharmaceutical acceptable acid addition salt thereof as the active ingredient, and 0.5 to 20 parts by weight of one or more stabilizing agents selected from the group consisting of magnesium silicate, magnesium oxide, hydrotalcite and sodium hydrogen carbonate per one part by weight of the isocarbostyril compound.
Claim 2
Dependent Claim
63 words
A stabilized pharmaceutical composition in the form of a solid preparation which comprises 4-(3-tert.-butylamino-2-hydroxy)propoxy-2-methylisocarbostyril or a pharmaceutical acceptable acid addition salt thereof as the active ingredient, and 0.5 to 20 parts by weight of one or more stabilizing agents selected from the group consisting of magnesium silicate, magnesium oxide, hydrotalcite and sodium hydrogen carbonate per one part by weight of the isocarbostyril compound.
Claim 3
Dependent Claim
75 words
A stabilized pharmaceutical composition in the form of a solid preparation which comprises 4-(3-tert.-butylamino-2-hydroxy)propoxy-2-methylisocarbostyril or a pharmaceutically acceptable acid addition salt thereof as the active ingredient, and 0.5 to 20 parts by weight of one or more stabilizing agents selected from the group consisting of magnesium silicate, magnesium oxide, hydrotalcite and sodium hydrogen carbonate per one part by weight of the isocarbostyril compound, in association with a pharmaceutically acceptable solid carrier for the active ingredient.
Claim 4
Dependent Claim
75 words
A stabilized pharmaceutical composition in the form of a solid preparation which comprises 4-(3-tert.-butylamino-2-hydroxy)propoxy-2-methylisocarbostyril or a pharmaceutically acceptable acid addition salt thereof as the active ingredient, and 0.5 to 20 parts by weight of one or more stabilizing agents selected from the group consisting of magnesium silicate, magnesium oxide, hydrotalcite and sodium hydrogen carbonate per one part by weight of the isocarbostyril compound, in association with a pharmaceutically acceptable solid carrier for the active ingredient.
Claim 5
Dependent Claim
23 words
The composition as claimed in claim 1 or claim 2 in which the pharmaceutically acceptable acid addition salt of 4-(3-tert.-butylamino-2-hydroxy)propoxy-2-methylisocarbostyril is the hydrochloride.
Claim 6
Independent Claim
62 words
A method of stabilizing 4-(3-tert.-butylamino-2-hydroxy)propoxy-2-methylisocarbostyril or a pharmaceutically acceptable acid addition salt thereof, which comprises adding to and mixing with the isocarbostyril compound one or more stabilizing agents selected from the group consisting of magnesium silicate, magnesium oxide, hydrotalcite and sodium hydrogen carbonate in an amount of 0.5 to 20 parts by weight per one part by weight of the isocarbostyril compound.
Claim 7
Independent Claim
62 words
A method of stabilizing 4-(3-tert.-butylamino-2-hydroxy)propoxy-2-methylisocarbostyril or a pharmaceutically acceptable acid addition salt thereof, which comprises adding to and mixing with the isocarbostyril compound one or more stabilizing agents selected from the group consisting of magnesium silicate, magnesium oxide, hydrotalcite and sodium hydrogen carbonate in an amount of 0.5 to 20 parts by weight per one part by weight of the isocarbostyril compound.
Claim 8
Dependent Claim
49 words
The composition as claimed in claim 1 or claim 2 which is in the form of a solid preparation and which comprises a pharmaceutically acceptable acid addition salt of 4-(3-tert.-butylamino-2-hydroxy)propoxy-2-methylisocarbostyril and 1 to 3 parts by weight of magnesium silicate per one part by weight of the isocarbostyril compound.
Claim 9
Dependent Claim
47 words
The composition as claimed in claim 1 or claim 2 which is in the form of a solid preparation and which comprises a pharmaceutically acceptable acid addition salt of 4-(3-tert.-butylamino-2-hydroxy)propoxy-2-methylisocarbostyril and 1-3 parts by weight of magnesium oxide per one part by weight of the isocarbostyril compound.
Claim 10
Dependent Claim
46 words
The composition as claimed in claim 1 or claim 2 which is in the form of a solid preparation and which comprises a pharmaceutically acceptable acid addition salt of 4-(3-tert.-bytylamino-2-hydroxy)propoxy-2-methylisocarbostyril and 1-3 parts by weight of hydrotalcite per one part by weight of the isocarbostyril compound.
Claim 11
Dependent Claim
48 words
The composition as claimed in claim 1 or claim 2 which is in the form of a solid preparation and which comprises a pharmaceutically acceptable acid addition salt of 4-(3-tert.-butylamino-2-hydroxy)propoxy-2-methylisocarbostyril and 1-3 parts by weight of sodium hydrogen carbonate per one part by weight of the isocarbostyril compound.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-05-18 | 1990-11-17 | 1991-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-18 | 1994-11-17 | 1995-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-18 | 1998-11-17 | 1999-05-19 | $7700.00 | Window Closed / Lapsed |