Dispensing – With filter – Associated with vent passage
Patent
1989-12-29
1992-04-21
Huppert, Michael S.
Dispensing
With filter
Associated with vent passage
222420, 21032189, B67D 558
Patent
active
051059932
ABSTRACT:
There is disclosed a dispensing container for dispensing sterile liquid medicament, for example into the eyes, e.g., liquid artificial tears, in which a filter is provided in the dispensing nozzle or in a closure member for the container having pores which are sufficiently small to filter out microorganisms, whereby an antibacterial agent need not be included in the medicament. A cap is provided for the dispensing nozzle, which cap may have an absorbent pad impregnated with an antibacterial agent to maintain the exit port of the dispensing nozzle sterile. The container may also have a filter provided in a vent in a wall thereof, whereby air drawn into the container to replace liquid medicament ejected through the nozzle thereof will be sterilized. The filter preferably comprises a plurality of hollow elongated filter fibers or tubes bent back on themselves and secured in the nozzle or closure member by a suitable potting material, having in any case pores not larger than about 0.2 micron in diameter.
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Chan Peter W.
La Haye Peter G.
Hueschen Gordon W.
Huppert Michael S.
Huson Gregory L.
La Haye Laboratories, Inc.
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