Controlled-release dispenser

Details Controlled-release dispenser Controlled-release dispenser

1982-01-08

1984-05-01

Kashnikow, Andres

Fluid sprinkling, spraying, and diffusing

Processes

Involving slow diffusion

43900, 239 56, A01M 100, A61L 904

Patent

active

044456417

ABSTRACT:
A dispenser for active ingredients is disclosed which provides zero-order rate of release of essentially all of the active ingredients. The dispenser comprises a rate-controlling membrane and a solid microporous polymeric reservoir having interconnected or continuous pores capable of retaining the active ingredient by capillary forces, the reservoir being such that the active ingredient is essentially insoluble therein.

REFERENCES:
patent: 3770199 (1973-11-01), Hoek et al.
patent: 4356969 (1982-11-01), Obermayer et al.

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