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:
Apr. 24, 2007
Filed:
Oct. 15, 2004
Boris Y. Shekunov, Aurora, OH (US);
Pratibhash Chattopadhyay, North Royalton, OH (US);
Jeffrey S. Seitzinger, Broadview Heights, OH (US);
Boris Y. Shekunov, Aurora, OH (US);
Pratibhash Chattopadhyay, North Royalton, OH (US);
Jeffrey S. Seitzinger, Broadview Heights, OH (US);
Ferro Corporation, Cleveland, OH (US);
Abstract
The present invention provides a method of forming particles that involves contacting a solution, which includes a solute and/or other material to be precipitated dissolved or dispersed in a solvent, with a first compressed or liquefied gas at an initial temperature to form a mixture. The mixture is then expanded at a first temperature to form droplets. Depending upon the composition of the droplets and the first temperature, the droplets may be in a solid state or a liquid state. The droplets are then contacted with an extracting fluid at a second temperature to extract the solvent from the droplets. The method can be used to produce micro and nanoparticles suitable for various drug delivery systems.