Surgery – Respiratory method or device – Means for mixing treating agent with respiratory gas
Reexamination Certificate
2005-03-22
2005-03-22
Bennett, Henry (Department: 3743)
Surgery
Respiratory method or device
Means for mixing treating agent with respiratory gas
C128S203120, C424S489000
Reexamination Certificate
active
06868853
ABSTRACT:
An electro-dose constitutes a metered medical powder and is formed from an electro-powder constituting an active powder substance or a dry powder medical formulation being transferred onto a device member forming a dose carrier. The electro-dose prepared from an electro-powder presents a fine particle fraction (FPF) having of the order 50% or more of its content with a particle size between 0.5-5 μm. The electro-powder of such a metered electro-dose further provides electrostatic properties regarding absolute specific charge per mass after charging of the order 0.1 to 25 μC/g and presents a charge decay rate constant Q50of more than 0.1 sec with a tap density of less than 0.8 g/ml and a water activity awof less than 0.5. The electro-dose porosity is adjusted to obtain an optimized porosity value in percent of 75 to 99.9 calculated as 100−100×(Densityelectro-dose/Densityelectro-powder).
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Nilsson Lars-Gunnar
Nilsson Thomas
Bennett Henry
Microdrug AG
Patel Mital
Young & Thompson
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