Controlled agglomeration

Drug – bio-affecting and body treating compositions – Preparations characterized by special physical form – Tablets – lozenges – or pills

Reexamination Certificate

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Details

C424S078080, C424S458000, C424S459000, C424S461000, C424S464000, C424S470000, C424S497000, C428S357000, C428S402000, C428S403000, C428S407000

Reexamination Certificate

active

10482558

ABSTRACT:
A process for the preparation of a particulate material by a controlled agglomeration method, i.e. a method that enables a controlled growth in particle size. The method is especially suitable for use in the preparation of pharmaceutical compositions containing a therapeutically and/or prophylactically active substance which has a relatively low aqueous solubility and/or which is subject to chemical decomposition. The process comprising i) spraying a first composition comprising a carrier, which has a melting point of about 5° C. or more which is present in the first composition in liquid form, on a second composition comprising a material in solid form, the second composition having a temperature of at the most a temperature corresponding to the melting point of the carrier and/or the carrier composition and ii) mixing or others means of mechanical working the second composition onto which the first composition is sprayed to obtain the particulate material.

REFERENCES:
patent: 1 930 068 (1970-12-01), None
patent: 0 306 465 (1989-03-01), None
patent: 59-40828 (1985-09-01), None
patent: WO 99/13864 (1999-03-01), None
patent: WO 01/22941 (2001-04-01), None
A. Faham et al.,Pharmazie, 55(6):444-448 (2000).
Database WPI Week 8303 Derwent Publications Ltd., XP002217469 (1982).
Database WPI Week 8544 Derwent Publications Ltd., XP002180851 (1985).

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