Methods for fine powder formation

Details Methods for fine powder formation Methods for fine powder formation

2007-10-09

2007-10-09

Davis, Robert (Department: 1722)

Plastic article or earthenware shaping or treating: apparatus

Means making particulate material directly from liquid or...

C425S007000, C264S013000, C424S489000

Reexamination Certificate

active

10224676

ABSTRACT:
Improved methods for forming fine particles of a material have been developed, wherein the method steps include dissolving the material in a solvent to form a dilute solution, immobilizing the dilution solution, and then removing the solvent to yield particles of the material. Methods of immobilizing the dilute solution include freezing, gelation, and chelation. In a preferred embodiment, the immobilized solvent is removed by lyophilization, i.e. reducing the ambient pressure while avoiding application of sufficient heat to power a phase transition. Essentially any material and solvent for the material can be used in the methods described herein. Proteins and peptides in an aqueous solvent are the preferred systems.

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