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US4723957A Expired / Lapsed US ⏱️ 0.0 years remaining

System for delivering drug with enhanced bioacceptability

Assignee: Alza Corp
•
Filing: 1986-02-07
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Granted: 1988-02-09
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Expires: 2006-02-07
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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. L. Wong
  • 👤 Felix Theeuwes
  • 👤 George V. Guittard

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-26 06:39
CPC Classifications
A; A61; A61M; A61M31/00; A61K; A61K9/00; A61K9/0002; A61K9/0004; A61M31/002

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 94 words
A process for lessening the incidence of irritation of a mucosal environment associated with the beneficial drug potassium chloride that produces irritation of a mucosal environment, said process comprising the steps of administering a composition comprising polyethylene oxide, potassium carboxyvinyl polymer and potassium chloride to a mucosal environment, lessening the incidence of unwanted irritation by the polyethylene oxide and potassium carboxyvinyl polymer cooperating in the presence of fluid in the mucosal environment reduce direct contact of the potassium chloride within the mucosal tissue, thereby lessening the incidence of irritation associated with potassium chloride therapy.
Claim 2
Dependent Claim 94 words
A process for lessening the incidence of irritation of a mucosal environment associated with the beneficial drug potassium chloride that produces irritation of a mucosal environment, said process comprising the steps of administering a composition comprising polyethylene oxide, potassium carboxyvinyl polymer and potassium chloride to a mucosal environment, lessening the incidence of unwanted irritation by the polyethylene oxide and potassium carboxyvinyl polymer cooperating in the presence of fluid in the mucosal environment reduce direct contact of the potassium chloride within the mucosal tissue, thereby lessening the incidence of irritation associated with potassium chloride therapy.
Claim 3
Dependent Claim 138 words
A process for lessening the incidence of irritation of a mucosal environment associated with a drug that produces irritation of a mucosal environment, said process comprising administering a composition comprising means for lessening the incidence of irritation associated with a drug that produces irritation on contact, said means comprising (a) a first hydrogel that is essentially neutral in fluid in the mucosal environment which first hydrogel interacts with the fluid and swells, and (b) a second hydrogel that is ionic in fluid in the mucosal environment which second hydrogel interacts with the fluid and swells to a lesser volume than the first hydrogel, and which process lessens the incidence of irritation by the first hydrogel and second hydrogel acting together in the mucosal environment to lessen the incidence of irritation of the mucosal tissue associated with the drug.
Claim 4
Dependent Claim 138 words
A process for lessening the incidence of irritation of a mucosal environment associated with a drug that produces irritation of a mucosal environment, said process comprising administering a composition comprising means for lessening the incidence of irritation associated with a drug that produces irritation on contact, said means comprising (a) a first hydrogel that is essentially neutral in fluid in the mucosal environment which first hydrogel interacts with the fluid and swells, and (b) a second hydrogel that is ionic in fluid in the mucosal environment which second hydrogel interacts with the fluid and swells to a lesser volume than the first hydrogel, and which process lessens the incidence of irritation by the first hydrogel and second hydrogel acting together in the mucosal environment to lessen the incidence of irritation of the mucosal tissue associated with the drug.

References Cited (Backward Citations)

US4224427A Cited
US4285987A Cited
US4235236A Cited
US4320759A Cited
US4327725A Cited
US4434153A Cited
US4449983A Cited
US4519801A Cited
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US4593053A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1991-02-08 1991-08-10 1992-02-09 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1995-02-08 1995-08-10 1996-02-09 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1999-02-08 1999-08-10 2000-02-09 $7700.00 Window Closed / Lapsed

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