US4835188A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spray dried ibuprofen
Assignee: Wyeth LLC
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Filing: 1987-12-08
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Granted: 1989-05-30
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Expires: 2007-12-08
Abstract
Abstract A therapeutic taste-neutral powder form of ibuprofen obtained by spray-drying a dispersion of ibuprofen and ethyl cellulose in water having a plasticiser dissolved or suspended therein.
Inventors
- 👤 Ying T. R. Ho
- 👤 Robert G. Blank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:56
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/14; A61K9/16; A61K9/1605; A61K9/1617; A61K31/00; A61K31/185; A61K31/19; A61K9/0012; A61K9/0053; A61K9/0056; A61K9/1629; A61K9/1652; A61P; A61P25/00; A61P25/04; A61P29/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
69 words
A therapeutic taste neutral powder form of spray-dried ibuprofen which consists essentially of, based upon the weight of the powder, about 63% to 77% by weight ibuprofen, about 25% to 40% by weight ethyl cellulose and about 2% to 7% by weight of a plasticizer, the powder having been spray dried from a dispersion of the ibuprofen and ethyl cellulose in water having a plasticizer dissolved or suspended therein.
Claim 2
Dependent Claim
69 words
A therapeutic taste neutral powder form of spray-dried ibuprofen which consists essentially of, based upon the weight of the powder, about 63% to 77% by weight ibuprofen, about 25% to 40% by weight ethyl cellulose and about 2% to 7% by weight of a plasticizer, the powder having been spray dried from a dispersion of the ibuprofen and ethyl cellulose in water having a plasticizer dissolved or suspended therein.
Claim 3
Dependent Claim
103 words
In a pharmaceutical dosage form for oral administration as a solid, which dosage form can be disintegrated by water within ten seconds, the improvement which comprises incorporating into such dosage form as the pharmaceutical substance a therapeutic taste-neutral powder form of spraydried ibuprofen which consists essentially of, based upon the weight of the powder, about 63% to 77% by weight ibuprofen, about 25% to 40% by weight ethyl cellulose and about 2% to 7% by weight of a plasticizer, the powder having been spray dried from a dispersion of the ibuprofen and ethyl cellulose in water having a plasticizer dissolved or suspended therein.
Claim 4
Dependent Claim
103 words
In a pharmaceutical dosage form for oral administration as a solid, which dosage form can be disintegrated by water within ten seconds, the improvement which comprises incorporating into such dosage form as the pharmaceutical substance a therapeutic taste-neutral powder form of spraydried ibuprofen which consists essentially of, based upon the weight of the powder, about 63% to 77% by weight ibuprofen, about 25% to 40% by weight ethyl cellulose and about 2% to 7% by weight of a plasticizer, the powder having been spray dried from a dispersion of the ibuprofen and ethyl cellulose in water having a plasticizer dissolved or suspended therein.
Claim 5
Dependent Claim
96 words
In a pharmaceutical dosage form for oral administration as a solid chewable taste-neutral tablet containing ibuprofen, the improvement which comprises incorporating into such tablet as the pharmaceutical substance a therapeutic taste-neutral powder form of spray-dried ibuprofen which consists essentially of, based upon the weight of the powder, about 63% to 77% by weight ibuprofen, about 25% to 40% by weight ethyl cellulose and about 2% to 7% by weight of a plasticizer, the powder having been spray dried from a dispersion of the ibuprofen and ethyl cellulose in water having a plasticizer dissolved or suspended therein.
Claim 6
Dependent Claim
96 words
In a pharmaceutical dosage form for oral administration as a solid chewable taste-neutral tablet containing ibuprofen, the improvement which comprises incorporating into such tablet as the pharmaceutical substance a therapeutic taste-neutral powder form of spray-dried ibuprofen which consists essentially of, based upon the weight of the powder, about 63% to 77% by weight ibuprofen, about 25% to 40% by weight ethyl cellulose and about 2% to 7% by weight of a plasticizer, the powder having been spray dried from a dispersion of the ibuprofen and ethyl cellulose in water having a plasticizer dissolved or suspended therein.
Claim 7
Dependent Claim
24 words
The taste neutral powder of claim 1 wherein the ethyl cellulose is about 28% to 40% by weight and the plasticizer is dibutyl sebacate.
Claim 8
Dependent Claim
23 words
The dosage form of claim 2 wherein the ethyl cellulose is about 28% to 40% by weight and the plasticizer is dibutyl sebacate.
Claim 9
Dependent Claim
23 words
The dosage form of claim 3 wherein the ethyl cellulose is about 28% to 40% by weight and the plasticizer is dibutyl sebacate.
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) | 1992-05-29 | 1992-11-28 | 1993-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-29 | 1996-11-28 | 1997-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-29 | 2000-11-28 | 2001-05-30 | $7700.00 | Window Closed / Lapsed |