Aerosol delivery system

Details Aerosol delivery system Aerosol delivery system

2007-02-27

2007-02-27

Ngo, Lien M. (Department: 3754)

Dispensing

With discharge assistant

Container with follower

C141S020000

Reexamination Certificate

active

10475911

ABSTRACT:
An aerosol delivery system comprises a container defining a chamber for a product to be delivered, an outlet from the chamber through which product may in operation be delivered, a valve for controlling passage of product through the outlet and a pump for pressurising product to be delivered, wherein the pump comprises an expandable material which, in operation, may be expanded to provide the pressure for pressurising product to be delivered, the expandable material being an osmotically effective agent and/or a swellable hydrogel and being disposed on one side of a semi-permeable membrane through which, in operation, fluid may be absorbed by the expandable material to expand it and thereby generate an osmotic pressure.

REFERENCES:
patent: 3128922 (1964-04-01), Jacob
patent: 3189231 (1965-06-01), Kibbel, Jr. et al.
patent: 3613963 (1971-10-01), Berkmuller
patent: 3756476 (1973-09-01), Bonduris
patent: 3819092 (1974-06-01), Bonduris
patent: 4207893 (1980-06-01), Michaels
patent: 4350271 (1982-09-01), Eckenhoff
patent: 5065900 (1991-11-01), Scheindel
patent: 5312389 (1994-05-01), Theeuwes et al.
patent: 5346476 (1994-09-01), Elson
patent: 5997527 (1999-12-01), Gumucio et al.
patent: WO 00/23663 (2000-04-01), None

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