US4740201A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intravenous system for delivering a beneficial agent
Assignee: Alza Corp
•
Filing: 1985-02-19
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Granted: 1988-04-26
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Expires: 2005-02-19
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
2026-10-29 18:14
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/14; A61M5/1407
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
82 words
An agent formulation chamber for use in an intravenous therapeutic system, the chamber comprising; (a) a lumen having inlet and outlet means; and, (b) delivery device in the chamber, which device contains an agent and means for releasing same, and when in operation, releases the agent into an intravenously acceptable liquid that flows through the chamber, with the agent released at a rate controlled substantially by the device and substantially independent of the volume rate of liquid that flows through the chamber.
Claim 2
Dependent Claim
82 words
An agent formulation chamber for use in an intravenous therapeutic system, the chamber comprising; (a) a lumen having inlet and outlet means; and, (b) delivery device in the chamber, which device contains an agent and means for releasing same, and when in operation, releases the agent into an intravenously acceptable liquid that flows through the chamber, with the agent released at a rate controlled substantially by the device and substantially independent of the volume rate of liquid that flows through the chamber.
Claim 3
Dependent Claim
34 words
The formulation chamber for use in an intravenous therapeutic system according to claim 1 wherein the delivery device maintains its physical and chemical integrity during the release period and the agent is a drug.
Claim 4
Dependent Claim
47 words
The formulation chamber for use in an intravenous therapeutic system according to claim 1, wherein the delivery device comprises a semipermeable wall that surrounds a compartment containing an agent, and a passageway in the wall that communicates with the compartment for releasing the agent from the device.
Claim 5
Dependent Claim
58 words
The formulation chamber for use in the intravenous therapeutic system according to claim 1, wherein the agent delivery device comprises a semipermeable wall that surrounds a first agent compartment and a second osmotically effective solute compartment separated by a flexible membrane, and a passageway through the wall communicating with the first compartment for releasing agent from the device.
Claim 6
Dependent Claim
24 words
The formulation chamber for use in the intravenous therapeutic system according to claim 1, wherein said chamber additionally is used as a drip chamber.
Claim 7
Dependent Claim
49 words
The formulation chamber for use in the intravenous therapeutic system according to claim 1, wherein said chamber simultaneously is employed as a drip chamber that provides a measurable number of drops per minute of liquid which liquid transports the agent released by the device to an agent receptor site.
Claim 8
Dependent Claim
40 words
The formulation chamber for use in the intravenous therapeutic system according to claim 1 wherein the inlet is a means for admitting liquid into the chamber, and the outlet is a means for letting an agent solution leave the chamber.
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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) | 1991-04-26 | 1991-10-26 | 1992-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-26 | 1995-10-26 | 1996-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-26 | 1999-10-26 | 2000-04-26 | $7700.00 | Window Closed / Lapsed |