Insulated canister for metered dose inhalers
A cartridge and inner container technology, applied in the field of cartridges with double walls, can solve problems such as the inability to deliver therapeutic compounds
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[0009] The invention features an insulated cartridge suitable for use as a storage container for pharmaceutical compositions, including therapeutic compounds susceptible to heat. The insulated cartridge can be used, for example, as an integral part of an MDI, a topical sprayer cartridge, or a nasal aqueous liquid inhaler. The insulated canister includes a double wall structure having an outer vessel surrounding an inner vessel having a different taper than the outer vessel to form an insulating gap between the outer vessel and the inner vessel. The inner container defines a lumen 32 that holds a pharmaceutical composition (defined hereinafter) administered by the delivery system. An insulating material as defined below is provided in the insulating gap. Furthermore, the inner surface of the inner container can optionally be covered with a coated base material.
[0010] Figure 1 shows a cross-sectional view of an exemplary embodiment of an insulated cartridge 10 for pressuriz...
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