The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 08, 2005
Filed:
Jan. 30, 2002
Robert O. Williams, Iii, Austin, TX (US);
Keith P. Johnston, Austin, TX (US);
Timothy J. Young, Midland, MI (US);
True L. Rogers, Austin, TX (US);
Melisa K. Barron, Conroe, TX (US);
Zhongshui Yu, Austin, TX (US);
Jiahui HU, Austin, TX (US);
Robert O. Williams, III, Austin, TX (US);
Keith P. Johnston, Austin, TX (US);
Timothy J. Young, Midland, MI (US);
True L. Rogers, Austin, TX (US);
Melisa K. Barron, Conroe, TX (US);
Zhongshui Yu, Austin, TX (US);
Jiahui Hu, Austin, TX (US);
Board of Regents, University of Texas System, Austin, TX (US);
Abstract
The present invention provides a system and a method for the production of microparticles and nanoparticles of materials that can be dissolved. The system and method of the present invention provide quicker freezing times, which in turn produces a more uniform distribution of particle sizes, smaller particles, particles with increased porosity and a more intimate mixing of the particle components. The system and method of the present invention also produce particles with greater surface area than conventional methods. One form of the present invention provides a method for the preparation of particles. An effective ingredient is mixed with water, one or more solvents, or a combination thereof, and the resulting mixture is sprayed through an insulating nozzle located at or below the level of a cryogenic liquid. The spray generates frozen particles.