Process for preparing inhalable powders

Drug – bio-affecting and body treating compositions – Effervescent or pressurized fluid containing – Organic pressurized fluid

Reexamination Certificate

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Reexamination Certificate

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10225781

ABSTRACT:
The invention relates to a new process for producing powdered preparations for inhalation comprising a substance having a smaller particle size distribution and a substance having a larger particle size distribution, wherein a substance having a smaller particle size distribution and a substance having a larger particle size distribution are continuously metered into a suitable mixing container such that the quotient N of the delivery speed for the metering of the substance having the smaller particle size distribution and the delivery speed for the metering of the substance having the larger particle size distribution is at least as great as the quotient M of the total mass of the substance having the smaller particle size distribution and the total mass of the substance having the larger particle size distribution.

REFERENCES:
patent: 5478578 (1995-12-01), Arnold et al.
patent: 5610163 (1997-03-01), Banholzer et al.
U.S. Appl. No. 09/977,911, filed Oct. 11, 2001, Applicant: Walz, M. et al.
U.S. Appl. No. 09/975,418, filed Oct. 11, 2001, Applicant: Bechtold-Peters, K. et al.
U.S. Appl. No. 10/226,062, filed Aug. 22, 2002, Applicant: Boeck, G.. et al.

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