Method for continuous liberation of active constituents into wat

Details Method for continuous liberation of active constituents into wat Method for continuous liberation of active constituents into wat

1992-02-18

1994-03-29

Page, Thurman K.

Drug, bio-affecting and body treating compositions

Preparations characterized by special physical form

21032184, 215261, 215308, 215310, 220203, 220367, 220371, 220373, 239 34, 239 57, 239 58, 422102, 422104, 424424, 6098921, A61K 900

Patent

active

052982483

ABSTRACT:
An apparatus is provided for continuous and regular liberation of active constituents into domestic water supplies. The apparatus comprises a receptacle having a body portion which is impermeable to water and to the active constituent. The receptacle is provided with an aperture closed by a membrane which is permeable to water and to the active constituent. An operculum surrounds the membrane to secure the membrane to the receptacle. The active constituent is provided into the receptacle and is released through the membrane in a controlled manner over an extended period of time. Preferably, the membrane has a mean pore diameter greater than 0.05 microns.

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