Patent ID: 8152793

Claim:
A membrane shell of an implantable dosage system incorporating an active agent, comprising: a first half and a second half, wherein both the first and second halves comprise an inner surface and an outer surface, wherein the first and second halves are adapted to be connected to each other through a closable joint comprising a closure edge of the first half as continuous on the inner surface of the first half essentially at a perimeter of the first half and a closure edge of the second half as continuous on the inner surface of the second half essentially at a perimeter of the second half, and the closure edges of the first and second halves comprise at least one groove and/or at least one protrusion as continuous or discontinuous, wherein the membrane shell is adapted to be closed so that at least one protrusion and/or at least one groove of the second half becomes opposed to at least one groove and/or at least one protrusion of the first half through a snap-fit joint, wherein the active agent is released through the membrane shell when implanted in a patient, and wherein the membrane shell is fabricated solely from a molded composition comprising modified PDMS (polydimethyl siloxane) either alone or in combination with PDMS so as to influence the release of the active agent.