Dispenser for dispensing beneficial agent

Details Dispenser for dispensing beneficial agent Dispenser for dispensing beneficial agent

1979-12-31

1981-09-22

Rosenbaum, C. Fred

Surgery

Respiratory method or device

Ozone or ion generation

A61M 700

Patent

active

042904269

ABSTRACT:
A dispenser is disclosed for dispensing a beneficial agent to a fluid environment. The dispenser comprises an impermeable container, a reservoir, a passageway, a beneficial agent, and a polymeric agent. In operation, beneficial agent is dispensed by fluid entering the reservoir motivating the polymeric agent to undergo fluid induced transition to a viscofluid, with beneficial agent dispensed by (a) viscofluid exiting through the passageway and transporting beneficial agent concurrently therewith, or by (b) beneficial agent exhibiting an increased coefficient of diffusion in the viscofluid and diffusing therethrough to the exterior of the device. An embodiment of the invention pertaining to laminates also is disclosed as useful for manufacturing the dispenser.

REFERENCES:
patent: 3630200 (1971-12-01), Higuchi
patent: 3851648 (1974-12-01), Brooke
patent: 3975350 (1976-08-01), Hudgin et al.
patent: 4056496 (1977-11-01), Mancini et al.
patent: 4064086 (1977-12-01), Cowsar et al.
patent: 4164560 (1979-08-01), Folkman et al.
patent: 4203442 (1980-05-01), Michaels
patent: 4217898 (1980-08-01), Theeuwes

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