https://patents.google.com/patent/US4145001A/en
US4145001A - Packaging for controlled release of volatile substances - Google Patents
A package having plural layers with a quantity of volatile substance such as deodorizer sandwiched between the layers. The outer layers of the laminate are...
controlled releasevolatile substancespackaginggooglepatents
https://patents.google.com/patent/US12004629B2/en
US12004629B2 - Diffuser of volatile liquid substances equipped with a vapor permeable membrane,...
Disclosed is a diffuser of a volatile liquid substance of the type including a container of the volatile liquid substance, closed by at least one membrane...