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:
May. 01, 2007
Filed:
Apr. 24, 2002
Alexander E. Gash, Brentwood, CA (US);
Joe Satcher, Patterson, CA (US);
Thomas Tillotson, Tracy, CA (US);
Lawrence Hrubesh, Pleasanton, CA (US);
Randall Simpson, Livermore, CA (US);
Alexander E. Gash, Brentwood, CA (US);
Joe Satcher, Patterson, CA (US);
Thomas Tillotson, Tracy, CA (US);
Lawrence Hrubesh, Pleasanton, CA (US);
Randall Simpson, Livermore, CA (US);
The Regents of the University of California, Oakland, CA (US);
Abstract
Nanostructured chromium(III)-oxide-based materials using sol-gel processing and a synthetic route for producing such materials are disclosed herein. Monolithic aerogels and xerogels having surface areas between 150 m/g and 520 m/g have been produced. The synthetic method employs the use of stable and inexpensive hydrated-chromium(III) inorganic salts and common solvents such as water, ethanol, methanol, 1-propanol, t-butanol, 2-ethoxy ethanol, and ethylene glycol, DMSO, and dimethyl formamide. The synthesis involves the dissolution of the metal salt in a solvent followed by an addition of a proton scavenger, such as an epoxide, which induces gel formation in a timely manner. Both critical point (supercritical extraction) and atmospheric (low temperature evaporation) drying may be employed to produce monolithic aerogels and xerogels, respectively.