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:
Oct. 09, 2007
Filed:
Jun. 02, 2004
Method for preparation of particles from solution-in-supercritical fluid or compressed gas emulsions
Pratibhash Chattopadhyay, North Royalton, OH (US);
Boris Y. Shekunov, Aurora, OH (US);
Jeffrey S. Seitzinger, Broadview Heights, OH (US);
Pratibhash Chattopadhyay, North Royalton, OH (US);
Boris Y. Shekunov, Aurora, OH (US);
Jeffrey S. Seitzinger, Broadview Heights, OH (US);
Ferro Corporation, Cleveland, OH (US);
Abstract
The present invention provides a method of producing particles from solution-in-supercritical fluid or compressed gas emulsions. In accordance with the method of the invention, a solution that includes a solute dissolved in a solvent is contacted with supercritical fluid or compressed gas to form a solution-in-supercritical fluid or compressed gas emulsion. The emulsion is sprayed through an orifice to create spray droplets. The supercritical fluid or compressed gas and the solvent are removed from the spray droplets resulting in the formation of particles that include the solute. In one embodiment of the invention, the solvent is removed from the spray droplets by lyophilization. In another embodiment of the invention, the solvent is removed from the spray droplets by evaporation.