US4867969A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrogel formulation for administering non-steroidal drugs
Assignee: Alza Corp
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Filing: 1988-02-08
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Granted: 1989-09-19
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Expires: 2008-02-08
Abstract
Abstract A composition of matter comprising a drug, a neutral hydrogel and an ionic hydrogel. The composition can be administered from a delivery system to a biological receptor over time.
Inventors
- 👤 Paul R. Magruder
- 👤 Patrick S. Wong
- 👤 Felix Theeuwes
- 👤 George V. Guittard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:10
CPC Classifications
A; A61; A61M; A61M31/00; A61M31/002; A61K; A61K9/00; A61K9/0002; A61K9/0004
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
41 words
A composition of matter for administering a beneficial drug to an animal, the composition comprising from 25 ng to 1.5 g of a beneficial drug and a blend comprising 1% to 60% polyethylene oxide and 1% to 60% potassium carboxyvinyl polymer.
Claim 2
Dependent Claim
41 words
A composition of matter for administering a beneficial drug to an animal, the composition comprising from 25 ng to 1.5 g of a beneficial drug and a blend comprising 1% to 60% polyethylene oxide and 1% to 60% potassium carboxyvinyl polymer.
Claim 3
Dependent Claim
41 words
A composition of matter for administering a beneficial drug to an animal, the composition comprising from 25 ng to 1.5 g of a beneficial drug and a blend comprising 1% to 60% polyethylene oxide and 1% to 60% sodium carboxyvinyl polymer.
Claim 4
Dependent Claim
41 words
A composition of matter for administering a beneficial drug to an animal, the composition comprising from 25 ng to 1.5 g of a beneficial drug and a blend comprising 1% to 60% polyethylene oxide and 1% to 60% sodium carboxyvinyl polymer.
Claim 5
Dependent Claim
101 words
A therapeutic composition for orally administering a drug to the gastrointestinal tract of an animal, said therapeutic composition comprising (1) from 25 ng to 1.5 g of a non-steroidal, anti-inflammatory analgesic that is a member selected from the group consisting of non-steroidal propionic, non-steroidal acetic, non-steroidal fenamic, non-steroidal biphenylcarboxylic, and non-steroidal oxicam drugs, (2) from 1% to 60% of a polyethylene oxide, and (3) from 1% to 60% of a carboxypolymethylene polymer, which (1), (2) and (3) are concomitantly administered to the gastrointestinal tract wherein (2) and (3) cooperate for reducing the concentration of (1) in contact with the gastrointestinal mucosa.
Claim 6
Dependent Claim
101 words
A therapeutic composition for orally administering a drug to the gastrointestinal tract of an animal, said therapeutic composition comprising (1) from 25 ng to 1.5 g of a non-steroidal, anti-inflammatory analgesic that is a member selected from the group consisting of non-steroidal propionic, non-steroidal acetic, non-steroidal fenamic, non-steroidal biphenylcarboxylic, and non-steroidal oxicam drugs, (2) from 1% to 60% of a polyethylene oxide, and (3) from 1% to 60% of a carboxypolymethylene polymer, which (1), (2) and (3) are concomitantly administered to the gastrointestinal tract wherein (2) and (3) cooperate for reducing the concentration of (1) in contact with the gastrointestinal mucosa.
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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) | 1992-09-18 | 1993-03-20 | 1993-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-18 | 1997-03-20 | 1997-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-18 | 2001-03-20 | 2001-09-19 | $7700.00 | Window Closed / Lapsed |