Claims
- 1. A dispenser for storing and protecting a beneficial agent and for dispensing the beneficial agent to a fluid environment of use, the dispenser comprising:
- (a) a wall defining a housing, said housing comprising a first wall member and a second wall member; wherein the,
- (b) first wall member (1) surrounds an internal space for storing a beneficial agent; (2) comprises a wall forming composition comprising means for protecting the beneficial agent by substantially limiting the passage of fluid into the dispenser; and (3) comprises means for forming the dispenser with a second wall member; and wherein the,
- (c) second wall member (1) surrounds an internal space, (2) comprises a compositional means for permitting fluid to enter the dispenser; and, (3) comprises means for forming dispenser with the first wall member;
- (d) 5 nanograms to 20 grams of a beneficial agent in the internal space for storing and for protecting the beneficial agent;
- (e) means in the internal space that permits fluid to enter the dispenser for aiding in delivering the beneficial agent from the dispenser; and,
- (f) exit means in the dispenser for delivering a dose of the beneficial agent from the dispenser to the environment over time.
- 2. The dispenser for storing and protecting the beneficial agent and for dispensing it to an environment of use according to claim 1, wherein the means for protecting the beneficial agent is substantially impermeable to the passage of fluid.
- 3. The dispenser for storing and protecting the beneficial agent and for dispensing it to an environment of use according to claim 1, wherein the means for protecting the beneficial agent substantially limits the passage of fluid to a negligible volume of fluid to enter the dispenser.
CROSS-REFERENCE TO RELATED APPLICATIONS
This application is a division of U.S. Ser. No. 07/283,359 filed on Dec. 13, 1988 now 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 (31)
Divisions (1)
|
Number |
Date |
Country |
Parent |
283359 |
Dec 1988 |
|