Angel L Sanjurjo

US Patent:

6399216, Jun 4, 2002

Filed:

Jul 6, 2000

Appl. No.:

09/610923

Inventors:

Palitha Jayaweera - Fremont CA
Angel Sanjurjo - San Jose CA
Kai-Hung Lau - Cupertino CA
Naixiong Jiang - Palo Alto CA
David M. Lowe - Hayward CA

Assignee:

Gas Research Institute - Des Plaines IL

International Classification:

B32B 1504

US Classification:

428610, 428627, 428628, 428667, 428685, 428629, 1651341

Abstract:

A method for coating stainless steel in which a metallic material layer of Cr and alloys of Cr and at least one of Mo, W, Ni, Si, Ti, Zr is deposited onto a metal substrate. The metallic material layer is then annealed so as to form a diffusion layer between the metallic protective coating and the metal substrate. Thereafter, the metallic material layer may be passivated, forming a stable composition of at least one of carbides, borides, nitrides, silicides, oxides, and mixtures thereof on the metallic protective coating. The protective coatings of this invention significantly reduce the corrosion rate of stainless steel used in bromide-based absorption systems.

US Patent:

6416721, Jul 9, 2002

Filed:

Oct 1, 1999

Appl. No.:

09/410337

Inventors:

Angel Sanjurjo - San Jose CA
Kai Hung Lau - Cupertino CA

Assignee:

SRI International - Menlo Park CA

International Classification:

F28D 1300

US Classification:

422146, 422139, 422140, 422198

Abstract:

Fluidized bed reactors having centrally positioned heating means, as well as methods for their use, are provided. The subject reactors comprise a centrally positioned heating means (e. g. a susceptor rod) that, during operation, is at least partially immersed in a fluidized bed of particles. The subject reactors are further characterized in that, during use, a temperature gradient is produced within the reactor. The subject reactors find use in a variety of applications.

US Patent:

6725911, Apr 27, 2004

Filed:

Sep 28, 2001

Appl. No.:

09/966999

Inventors:

Palitha Jayaweera - Fremont CA
Angel Sanjurjo - San Jose CA
Kai-Hung Lau - Cupertino CA

Assignee:

Gas Research Institute - Des Plaines IL

International Classification:

F28F 1318

US Classification:

165133, 165905, 1651341

Abstract:

A condensing heat exchanger structure in contact with a combustion environment and which structure includes a ferrous substrate is provided with a corrosion resistant diffusion coating applied to the ferrous substrate via a fluidized bed application. Also provided is a method for improving the corrosion resistance of a condensing heat exchanger structure which includes a ferrous substrate and a surface portion at least partially exposed to a combustion product-containing environment. In such method, a corrosion resistant diffusion coating is applied onto the ferrous substrate via a fluidized bed application.

US Patent:

7559969, Jul 14, 2009

Filed:

Aug 6, 2004

Appl. No.:

10/913688

Inventors:

Angel Sanjurjo - San Jose CA, US
Eugene Thiers - San Mateo CA, US
Kai-Hung Lau - Cupertino CA, US
Don L. Hildenbrand - Mountain View CA, US
Gopala N. Krishnan - Sunnyvale CA, US
Esperanza Alvarez - Menlo Park CA, US

Assignee:

SRI International - Menlo Park CA

International Classification:

C22B 34/12
C22C 14/00
C22C 33/04
C22C 32/00

US Classification:

75359, 75367, 75613

Abstract:

The present invention is generally directed towards a method for producing a solid metallic composition by reacting a gaseous metal halide with a reducing agent are described. In one embodiment, the method includes reacting a gaseous metal halide with a reducing agent in a manner effective to form a nonsolid reaction product, wherein the metal halide has the formula MX, in which M is a metal selected from a transition metal of the periodic table, aluminum, silicon, boron, and combinations thereof, X is a halogen, i is greater than 0, and the reducing agent is a gaseous reducing agent selected from hydrogen and a compound that releases hydrogen, and combinations thereof; and solidifying the reaction product, thereby forming a metallic composition comprising M that is substantially free from halides. The invention may be used to produce high-purity metallic compositions, particularly titanium particles and alloys thereof for use in powder metallurgy applications.

US Patent:

7959707, Jun 14, 2011

Filed:

Apr 30, 2007

Appl. No.:

11/799387

Inventors:

Angel Sanjurjo - San Jose CA, US
Kai-Hung Lau - Cupertino CA, US
Xiaobing Xie - Foster City CA, US
Anoop Nagar - Palo Alto CA, US

Assignee:

SRI International - Menlo Park CA

International Classification:

B22F 9/20

US Classification:

75369, 75620, 423349

Abstract:

Aspects of the invention include methods for producing purified semiconductor or metallic materials. In one embodiment, the methods include admixing a particulate composition of a material, for instance, a metal, with a metal halide to produce a metal-metal halide admixture. The admixture is then heated to a temperature that is above the material's melting point in a container that is chemically and physically stable at that temperature. The molten admixture is allowed to segregate into a lower of the material and an layer of the metal halide and cooled. The metal halide is then separated from the material and a purified semiconductor or metallic material is thereby produced. Also provided are purified material crystals, shaped ingots and/or taper, sheet, or ribbons produced by such methods, as well as the silicon chips and solar panels in which such products are employed.

US Patent:

7977220, Jul 12, 2011

Filed:

Mar 4, 2009

Appl. No.:

12/397972

Inventors:

Angel Sanjurjo - San Jose CA, US

Assignee:

SRI International - Menlo Park CA

International Classification:

H01L 21/20
H01L 21/36
H01L 21/4763
H01L 21/44

US Classification:

438508, 438627, 438643, 438653

Abstract:

Aspects of the invention include methods for depositing silicon on a substrate. In certain embodiments, the methods include exposing a substrate containing silicon to a halogenated silane in a manner sufficient to deposit the silicon on the substrate. In certain embodiments, the method includes providing a substrate, one or more sources of gas, and a reaction vessel that is in fluid communication with the substrate and the one or more sources of gas. In certain embodiments, the substrate is a low or metallurgical grade silicon which may be subjected to a purification process. In certain embodiments, the reaction vessel is a particle bed reaction vessel that includes a moving bed, such as a fluidized bed which contains silicon and the gas includes a halide.

US Patent:

8101310, Jan 24, 2012

Filed:

May 19, 2005

Appl. No.:

11/134555

Inventors:

Alexander S. Lipilin - Ekaterinburg, RU
Iouri I. Balachov - Menlo Park CA, US
Lawrence H. Dubois - Palo Alto CA, US
Angel Sanjurjo - San Jose CA, US
Michael C. McKubre - Menlo Park CA, US
Steven Crouch-Baker - Palo Alto CA, US
Marc D. Hornbostel - Palo Alto CA, US
Francis Louis Tanzella - San Carlos CA, US

Assignee:

SRI International - Menlo Park CA

International Classification:

H01M 8/00

US Classification:

429430, 429440

Abstract:

An electrochemical cell is provided which has a liquid anode. Preferably the liquid anode comprises molten salt and a fuel, which preferably has a significant elemental carbon content. The supply of fuel is preferably continuously replenished in the anode. Where the fuel contains or pyrolizes to elemental carbon, the reaction C+2O→CO+4e may occur at the anode. The electrochemical cell preferably has a solid electrolyte, which may be yttrium stabilized zirconia (YSZ). The electrolyte is connected to a solid or liquid cathode, which is given a supply of an oxidizer such as air. An ion such as O passes through the electrolyte. If O passes through the electrolyte from the anode to the cathode, a possible reaction at the cathode may be O+4e→2O. The electrochemical cell of the invention is preferably operated as a fuel cell, consuming fuel and producing electrical current.

US Patent:

8465809, Jun 18, 2013

Filed:

May 4, 2007

Appl. No.:

12/299584

Inventors:

Angel Sanjurjo - San Jose CA, US
Kazunori Matsumoto - Imizu, JP
Carles Colominas - Vacarisses, ES
Gopala Krishnan - Sunnyvale CA, US
Palitha Jayaweera - Fremont CA, US
Kai-Hung Lau - Cupertino CA, US

Assignee:

SRI International - Menlo Park CA

International Classification:

B05D 1/22

US Classification:

427460, 427213, 4274345, 427580

Abstract:

A moving bed reactor system is provided. The system comprises at least one gas inlet, a distributor, a temperature control, a plurality of electrodes, and a spark control circuit. The spark control circuit drives the electrodes and generates a multi-arc discharge when the system is loaded with particles and a gas at approximately atmospheric pressure or greater is being pumped through the system. The multi-arc discharge is useful to create activated species which may improve the rate of a chemical reaction taking place in the moving bed reactor system.