Claims
- 1. A delivery system for delivering a beneficial agent to a fluid environment of use, wherein the delivery system comprises:
- (a) two sections assembled together at their receiving ends to form the delivery system; wherein
- (b) one section comprises a first wall that is substantially impervious to the passage of fluid and surrounds a first reservoir area;
- (c) one section comprises a second wall that is substantially pervious to the passage of fluid and surrounds a second reservoir area;
- (d) exit means in the first wall in the delivery system for delivering the beneficial agent from the first reservoir area to the environment of use; and wherein the delivery system comprises:
- (e) means in the second reservoir area surrounded by the second wall pervious to fluid for pushing the beneficial agent from the reservoir; and,
- (f) a beneficial agent in the first reservoir area surrounded by the first wall substantially impervious to the passage of fluid for protecting a fluid-sensitive beneficial agent while in the first reservoir from fluid present in the environment of use.
- 2. The delivery system for delivering the beneficial agent to an environment of use according to claim 1, wherein the two-pieces are fused together.
- 3. The delivery system for delivering the beneficial agent to an environment of use according to claim 1, wherein the two-pieces are assembled by an adhesive.
- 4. The delivery system for delivering the beneficial agent to an environment of use according to claim 1, wherein the two pieces assembled together are in telescopic engagement.
CROSS-REFERENCE TO RELATED APPLICATIONS
This application is a division of U.S. Ser. No. 07/283,359 filed on Dec. 13, 1988, U.S. Pat. No. 5,034,229 issued Jul. 23, 1991 which application is incorporated herein by reference, and benefit is claimed of its filing date. These applications are assigned to the ALZA Corporation of Palo Alto, Calif.
US Referenced Citations (49)
Divisions (1)
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Number |
Date |
Country |
Parent |
283359 |
Dec 1988 |
|