Patent US4994031A successfully refreshed from Google Patents.
US4994031A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intravenous system for delivering a beneficial agent
Assignee: Alza Corp
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Filing: 1989-04-17
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Granted: 1991-02-19
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Expires: 2009-04-17
Abstract
Abstract A formulation chamber is disclosed comprising a wall surrounding a lumen containing a device for delivering a beneficial agent. The chamber has an inlet for admitting a fluid into the chamber and an outlet for letting an agent formulation leave the chamber. The chamber is adapted for use in an intravenous delivery system for delivering an agent formulation to a patient.
Inventors
- 👤 Felix Theeuwes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 07:33
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/14; A61M5/1407
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
155 words
An improvement in an intravenous delivery system for administering a drug formulation, in which system the drug formulation is formed during the operation of the system, wherein the system comprises: (a) a container comprising a pharmaceutically acceptable intravenous fluid that is a carrier for a drug; (b) an intravenous administration set in communication with the container for permitting fluid to flow from the container through the set, the set comprising: (1) a drip chamber; and, (2) a drug formulation chamber in communication with the drip, chamber, such that fluid flows into the formulation chamber, which formulation chamber comprises: (i) a hollow housing; (ii) a fluid inlet and a fluid exit; and wherein the improvement comprises; (iii) means in the housing for storing a drug in a solid form and for releasing the drug into fluid that flows through the housing to form a fluid drug formulation for intravenous administration at a keep-the-vein-open rate over time.
Claim 2
Dependent Claim
155 words
An improvement in an intravenous delivery system for administering a drug formulation, in which system the drug formulation is formed during the operation of the system, wherein the system comprises: (a) a container comprising a pharmaceutically acceptable intravenous fluid that is a carrier for a drug; (b) an intravenous administration set in communication with the container for permitting fluid to flow from the container through the set, the set comprising: (1) a drip chamber; and, (2) a drug formulation chamber in communication with the drip, chamber, such that fluid flows into the formulation chamber, which formulation chamber comprises: (i) a hollow housing; (ii) a fluid inlet and a fluid exit; and wherein the improvement comprises; (iii) means in the housing for storing a drug in a solid form and for releasing the drug into fluid that flows through the housing to form a fluid drug formulation for intravenous administration at a keep-the-vein-open rate over time.
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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) | 1994-02-18 | 1994-08-20 | 1995-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-02-18 | 1998-08-20 | 1999-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-02-18 | 2002-08-20 | 2003-02-19 | $7700.00 | Window Closed / Lapsed |