Jerome P Downey
Engineers at Tamarack Dr, Butte, MT
License number
Colorado 28329
Issued Date
Jul 1, 1992
Renew Date
Nov 1, 2015
Expiration Date
Oct 31, 2017
Type
Professional Engineer
Address
Address
110 Tamarack Dr, Butte, MT 59701
Organization information
See more information about Jerome P Downey at bizstanding.comJerome P. Downey & Associates, P.L.L.C
110 Tamarack Dr, Butte, MT 59701
Industry:
Business Services at Non-Commercial Site
Professional information
High Purity Silicon-Containing Products And Method Of Manufacture
US Patent:
8470279, Jun 25, 2013
Filed:
Dec 29, 2009
Appl. No.:
12/649200
Inventors:
Norman D. Hinman - Centennial CO, US
Jerome P. Downey - Butte MT, US
Guy Lawrence Fredrickson - Idaho Falls ID, US
Antonio E. Blandon - Westminster CO, US
Jerome P. Downey - Butte MT, US
Guy Lawrence Fredrickson - Idaho Falls ID, US
Antonio E. Blandon - Westminster CO, US
Assignee:
Si Options, LLC - Centennial CO
International Classification:
C01B 33/12
US Classification:
423335, 423345
Abstract:
Silicon-containing products, such as silicon, silicon carbide and silicon nitride, containing less than 0. 01 weight percent total mineral impurities and selectively determined carbon-to-silicon ratios. The products are derived from plant matter, such as rice hulls and rice straw, containing at least three weight percent silica. Methods are provided for making such high purity silicon-containing products by leaching silica-containing plant matter with aqueous sulfuric acid under controlled temperatures, pressures and reaction times to remove minerals and metals while adjusting the mole ratio of fixed carbon to silica, and then thermally treating under controlled conditions to produce the desired product.