04915301 is referenced by 54 patents and cites 25 patents.

Volatile substances such as fragrances, perfumes, deodorizers, room freshener compositions and the like are dispensed in vapor phase from a container holding the substance in liquid phase at room temperature and under atmospheric pressure. The container has a window covered with a microporous membrane with an active structure formed from a material having a critical surface tension that is below the surface tension of the liquid substance. Generally the active membrane material has a critical surface tension that is below 22 dynes/cm and preferably below 20 dynes/cm while the surface tension of the liquid is at least 22 dynes/cm. One example is an ultraviolet irradiated polymer composition with 0.2 microns nominal pore size. In all instances the volatile substance is first sorbed within a porous element and desorbed therefrom for transport through the membrane only in its vapor phase.

Title
Container with sorbent member and microporous membrane for dispensing vapor from volatile liquid
Application Number
7/271628
Publication Number
4915301
Application Date
November 15, 1988
Publication Date
April 10, 1990
Inventor
Marina A Munteanu
New York
NY, US
Agent
Brooks Haidt Haffner & Delahunty
Assignee
International Flavors & Fragrances
NY, US
IPC
A61L 9/04
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