Pressurized product delivery systems

Details Pressurized product delivery systems Pressurized product delivery systems

1993-07-21

1996-04-23

Page, Thurman K.

Drug, bio-affecting and body treating compositions

Preparations characterized by special physical form

Matrices

424489, 424 45, A61L 904

Patent

active

055101160

ABSTRACT:
An apparatus for dispensing pressurized material is comprised of a container, a polymeric matrix having a network of macropores located within the container, and a propellant that may be reversibly sorbed with the network of macropores so as to desorb as the partial pressure of the propellant within the container decreases. The network of pores is substantially non-swellable upon sorption and desorption of the propellant during filling and use of the dispensing apparatus. The polymeric matrix may comprise aggregates of macroporous polymeric particles in which the particles define a substantially non-collapsible pore network and the aggregates define interstitial spaces between the particles, and the interstitial spaces are substantially larger than the pore network.

REFERENCES:
patent: 4690825 (1987-09-01), Won
patent: 4806360 (1989-02-01), Leong et al.
patent: 4855144 (1989-08-01), Leong et al.
patent: 4873091 (1989-10-01), Jankower et al.
patent: 5102662 (1992-04-01), Gallagher
patent: 5145685 (1992-09-01), Carmody

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