US4740197A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intravenous system for delivering a beneficial agent via polymer delivery
Assignee: Alza Corp
•
Filing: 1985-02-14
•
Granted: 1988-04-26
•
Expires: 2005-02-14
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
2026-10-27 08:08
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/14; A61M5/1407
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
98 words
A formulation chamber for use in an intravenous delivery system, comprising in combination: (a) a chamber comprising; a wall that surrounds a lumen; an inlet for admitting fluid into the chamber; and, an outlet for letting fluid leave the chamber; and, (b) a delivery device in the chamber, the device comprising: a body sized, shaped and adapted for placement in the chamber and formed of a polymeric composition that maintains its physical and chemical integrity; and, a beneficial agent in the composition that is released at a controlled rate by the device into the formulation chamber over time.
Claim 2
Dependent Claim
98 words
A formulation chamber for use in an intravenous delivery system, comprising in combination: (a) a chamber comprising; a wall that surrounds a lumen; an inlet for admitting fluid into the chamber; and, an outlet for letting fluid leave the chamber; and, (b) a delivery device in the chamber, the device comprising: a body sized, shaped and adapted for placement in the chamber and formed of a polymeric composition that maintains its physical and chemical integrity; and, a beneficial agent in the composition that is released at a controlled rate by the device into the formulation chamber over time.
Claim 3
Dependent Claim
47 words
The formulation chamber for use in the intravenous system according to claim 1, wherein when the chamber is placed in the intravenous system, the device delivers the agent at a rate controlled by the device into a fluid that flows from the system into the formulation chamber.
Claim 4
Dependent Claim
24 words
The formulation chamber for use in the intravaneous system according to claim 1 wherein the device releases the agent by the process of diffusion.
Claim 5
Dependent Claim
19 words
The formulation chamber for use in an intravenous system according to claim 1 wherein the polymeric material is microporous.
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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 |