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:
Nov. 22, 2005
Filed:
May. 19, 2003
Pratibhash Chattopadhyay, North Royalton, OH (US);
Boris Y. Shekunov, Aurora, OH (US);
Jeffrey S. Seitzinger, Broadview Heights, OH (US);
Robert W. Huff, North Royalton, OH (US);
Pratibhash Chattopadhyay, North Royalton, OH (US);
Boris Y. Shekunov, Aurora, OH (US);
Jeffrey S. Seitzinger, Broadview Heights, OH (US);
Robert W. Huff, North Royalton, OH (US);
Ferro Corporation, Cleveland, OH (US);
Abstract
A method for producing composite particles using a supercritical fluid extraction technique on an emulsion. First and second materials (for example; a polymer and a biologically active material) are dissolved or suspended in a preferably solvent to form a solution or dispersion. The solution or dispersion is emulsified in a polar solvent to form an oil-in-water or water-in-oil-in-water emulsion. The emulsion is contacted with a supercritical fluid to extract the solvent. Removal of the solvent by the supercritical fluid from the emulsion supersaturates at least the first material in the solution causing the first material to precipitate out of the solution as composite particles that include both the first and second materials.