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. 08, 2019
Filed:
Dec. 17, 2008
Albert Gary Difrancesco, Rochester, NY (US);
Thomas D. Allston, Lima, NY (US);
Richard K. Hailstone, North Chili, NY (US);
Andreas Langner, Pittsford, NY (US);
Kenneth J. Reed, Rochester, NY (US);
Albert Gary Difrancesco, Rochester, NY (US);
Thomas D. Allston, Lima, NY (US);
Richard K. Hailstone, North Chili, NY (US);
Andreas Langner, Pittsford, NY (US);
Kenneth J. Reed, Rochester, NY (US);
Cerion, LLC, Rochester, NY (US);
Abstract
A process for making cerium dioxide nanoparticles containing at least one transition metal (M) utilizes a suspension of cerium hydroxide nanoparticles prepared by mechanical shearing of an aqueous mixture containing an oxidant in an amount effective to enable oxidation of cerous ion to ceric ion, thereby forming a product stream that contains transition metal-containing cerium dioxide nanoparticles, CeMO, wherein 'x' has a value from about 0.3 to about 0.8. The nanoparticles thus obtained have a cubic fluorite structure, a mean hydrodynamic diameter in the range of about 1 nm to about 10 nm, and a geometric diameter of less than about 4 nm. The transition metal-containing crystalline cerium dioxide nanoparticles can be used to prepare a dispersion of the particles in a nonpolar medium.