Device for releasing a volatile substance in a controlled manner

Details Device for releasing a volatile substance in a controlled manner Device for releasing a volatile substance in a controlled manner

1976-10-12

1979-06-19

Reeves, Robert B.

Fluid sprinkling, spraying, and diffusing

Processes

239 56, A61L 904

Patent

active

041584406

ABSTRACT:
A device for releasing a volatile substance into the environment in a controlled manner comprises a reservoir of substance-absorbent material, for storing the substance, that is encapsulated in an envelope, at least a portion of which comprises a permeable material having porosity at least equal to ultramicroporosity. The permeable envelope portion has a greater affinity for the substance than does the reservoir material. The remainder of the envelope comprises a material impermeable to the substance. Accordingly, the substance permeates through the permeable envelope portion to be released therefrom in vapor form into the environment.

REFERENCES:
patent: 2988284 (1961-06-01), Smith
patent: 3770199 (1973-11-01), Hoek et al.
patent: 3846404 (1974-11-01), Nichols
patent: 3858807 (1975-01-01), Rabussier et al.
patent: 3940062 (1976-02-01), Rainey

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