Controlled release system

Details Controlled release system Controlled release system

1984-09-13

1986-05-06

Griffin, Ronald W.

Drug, bio-affecting and body treating compositions

Designated inorganic nonactive ingredient or elemental...

424 16, 424 19, 514770, 514953, 514965, 604890, 604891, 604892, A61K 926

Patent

active

045872678

ABSTRACT:
A device for the controlled release of an active material into an aqueous medium comprises a porous sintered body of a water soluble glass (11). The pores of the body are filled with a composition (12) consisting wholly or partially of an active material. The device may be provided with a low solubility coating (13). On immersion in an aqueous medium the glass (11) dissolves to become a sponge-like structure having a plurality of convoluted capillaries and from which the active material is released.

REFERENCES:
patent: 3923969 (1975-12-01), Baukal et al.
patent: 4123248 (1978-10-01), Drake
patent: 4283227 (1981-08-01), Drake
patent: 4349025 (1982-09-01), Drake
patent: 4449981 (1984-05-01), Drake et al.
patent: 4473545 (1984-09-01), Drake et al.

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