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. 02, 2007
Filed:
Jul. 11, 2002
Glen C. Irvin, Rochester, NY (US);
Ramesh Jagannathan, Rochester, NY (US);
Seshadri Jagannathan, Pittsford, NY (US);
Suresh Sunderrajan, Rochester, NY (US);
David D. Tuschel, Monroeville, PA (US);
William C. Lenhart, Hamlin, NY (US);
David J. Nelson, Rochester, NY (US);
Glen C. Irvin, Rochester, NY (US);
Ramesh Jagannathan, Rochester, NY (US);
Seshadri Jagannathan, Pittsford, NY (US);
Suresh Sunderrajan, Rochester, NY (US);
David D. Tuschel, Monroeville, PA (US);
William C. Lenhart, Hamlin, NY (US);
David J. Nelson, Rochester, NY (US);
Eastman Kodak Company, Rochester, NY (US);
Abstract
A process for the preparation of nanoscale particulate material is described comprising: (i) combining one or more functional material to be precipitated as nanoscale particles and one or more surface active material in a compressed COphase with a density of at least 0.1 g/cc, where the functional material is substantially insoluble in the compressed COin the absence of the surfactant, the surfactant comprises a compressed CO-philic portion and a functional material-philic portion, and the compressed COphase, functional material and surfactant interact to form an aggregated system having a continuous compressed COphase and a plurality of aggregates comprising surfactant and functional material molecules of average diameter less than 10 nanometers dispersed therein; and (ii) rapidly depressurizing the compressed COphase thereby precipitating the dispersed functional and surfactant materials in the form of composite particles of average diameter from 0.5 to less than 10 nanometers.