04605165 is referenced by 30 patents and cites 28 patents.

Described is an article useful for dispensing at a constant rate, continuously or discontinuously for discrete periods of time a volatile composition of matter such as an air freshener or perfume composition into the atmosphere surrounding said article, the article being a hollow totally enclosed flexible, rigid or partially flexible-partially rigid structure comprising a thin shell totally enclosing an inner void with part of the thin shell comprising a microporous polymer containing a plurality of finite solid filler particles whereby when the article is located in the ambient environment, the volatile material molecules are transported through the porous polymer at a substantially constant mass flow rate both of the individual volatile components and totally through the porous polymer. The functioning of the article is enabled because the microporous polymer section has (i) the property of transporting water vapor at a rate of between 50 up to 1000 g/m.sup.2 /day at about 25.degree. C. and at about 50% relative humidity at about atmospheric pressure and having an air transport rate of 100-20,000 Gurley seconds and a thickness in the range of from about 0.01 mils up to about 20 mils.

Title
Constant rate volatile composition dispensing article and process for using same
Application Number
6/620167
Publication Number
4605165
Application Date
June 13, 1984
Publication Date
August 12, 1986
Inventor
Geoffrey B Seaber
Ijsselstein
NL
Marina A Munteanu
New York
NY, US
Augustinus G Van Loveren
Rye
NY, US
Agent
Arthur L Liberman
Assignee
International Flavors & Fragrances
NY, US
IPC
A61L 9/12
A61L 9/01
A61L 9/04
View Original Source