Rate controlled dispenser for administering beneficial agent
First Claim
Patent Images
1. A dispenser for delivering avermectin to an environment of use, the dispenser comprising:
- (a) wall means for surrounding and forming a compartment, which compartment comprises;
(1) lipophilic means for absorbing thermal energy from the enviroment of use;
(2) a beneficially effective amount of avermectin present in the means for absorbing thermal energy;
(3) osmotically active means for mixing with an aqueous fluid present in the environment of use that enters the compartment for increasing the aqueous solution volume in the compartment; and
,(b) means in the wall for delivering avermectin from the dispenser to the environment of use over time.
2 Assignments
0 Petitions
Accused Products
Abstract
A dispenser is disclosed for delivering a beneficial agent. The dispenser comprises (1) a housing defining an internal space, (2) a heat-responsive composition containing a beneficial agent in the space, (3) an osmotically effective solute in the space, and (4) at least one passageway in the housing for delivering the beneficial agent from the dispenser.
-
Citations
40 Claims
-
1. A dispenser for delivering avermectin to an environment of use, the dispenser comprising:
-
(a) wall means for surrounding and forming a compartment, which compartment comprises; (1) lipophilic means for absorbing thermal energy from the enviroment of use; (2) a beneficially effective amount of avermectin present in the means for absorbing thermal energy; (3) osmotically active means for mixing with an aqueous fluid present in the environment of use that enters the compartment for increasing the aqueous solution volume in the compartment; and
,(b) means in the wall for delivering avermectin from the dispenser to the environment of use over time. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
-
-
19. A dispenser for delivering a beneficial agent composition to a biological environment of use, the dispenser comprising
(a) wall means that surrounds and defines an internal compartment; -
(b) means in the compartment for mixing with a beneficial agent, said means capable of changing its physical form in the presence of absorbed thermal energy from the biological environment of use; (c) a beneficial agent mixed in the means for absorbing thermal energy; (d) means in the compartment for imbibing an aqueous fluid present in the environment of use into the dispenser for forming continously an aqueous solution with the fluid that enters the compartment from the biological environment of use; and
,(e) means in the wall for dispensing the beneficial agent formulation from the dispenser to the biological environment of use over time. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
-
-
35. A dispenser for delivering a beneficial agent formulation to an environment of use, the dispenser comprising;
-
(a) a hollow body means for forming an internal lumen; (b) a heat-sensitive lipophilic formulation means in the lumen for absorbing heat from the environment of use for forming a deliverable formulation at a temperature of at least 31°
C.;(c) a beneficial agent mixed with the heat-sensitve formulation means; (d) means in the lumen for forming a solution with aqueous fluid imbibed into the dispenser from the environment of use, said means forming an aqueous solution for exerting pressure against the heat-sensitive formulation means; (e) a wall that surrounds the hollow body means, the wall comprising in at least a part a composition that is permeable to the passage of fluid; and
,(f) passageway means in the wall for connecting the exterior of the dispenser with the interior of the dispenser for delivering the beneficial agent to the environment of use at a controlled rate over a prolonged period of time.
-
-
36. A dispenser for delivering a beneficial agent formulation to an environment of use, the dispenser comprising;
-
(a) a wall that surrounds and forms an internal compartment, the wall comprising at least in part a member selected from the group consisting of a cellulose ester, cellulose diester, cellulose triester, cellulose ether, cellulose ester-ether, cellulose acylate, cellulose diacylate, cellulose triacylate; (b) a thermo-responsive composition that forms a dispensable composition when contacted by thermal energy at a temperature up to 45°
C. in the compartment, which composition is a carrier for a beneficial agent;(c) a beneficial agent blended with the carrier which produces a beneficial effect when administered by the dispenser to an animal; (d) an osmotically effective composition in the compartment that is substantially dry during storage temperature imbibes an aqueous fluid from the environment of use into the compartment and forms an aqueous solution at a temperature of from 30°
C. to 45°
C.; and
,(e) means in the wall connecting the environment of use with the compartment for delivering the beneficial agent form the dispenser to the environment of use. - View Dependent Claims (37)
-
- 38. A laminate useful for manufacturing a delivery device for dilivering a beneficial agent to a warm-blooded animal, wherein the laminate comprises (1) lamina means comprising at least in part a lipophilic member for containing a beneficial agent and for absorbing heat from the animal for forming a dispensable composition that is delivered from the delivery device to the aminal, and (2) lamina means for imbibing an aqueous fluid into the delivery device for forming an aqueous solution by mixing with fluid that enters the delivery device from the animal.
Specification