Bhakta B Rath

US Patent:

20060065330, Mar 30, 2006

Filed:

Sep 29, 2004

Appl. No.:

10/956595

Inventors:

Khershed Cooper - Fairfax VA, US
Bhakta Rath - Oakton VA, US
Harry Jones - Alexandria VA, US
Chandra Pande - McLean VA, US

International Classification:

C22C 1/08

US Classification:

148538000, 148400000

Abstract:

This invention pertains to a product and a method for making the product. The product is a lightweight solid porous metallic product containing small solid spheres having a coating of a primary alpha phase thereon disposed in a solid metal alloy eutectic matrix. The method includes the steps of mixing the hollow rigid spheres and a metal alloy, which metal alloy can be preheated to render it molten, in order to form a dispersion of the spheres distributed in the molten alloy; initially cooling the dispersion to render it semi-solid whereby the spheres are coated by a solid and the coated spheres are disposed in the semi-solid mixture of the solid and liquid; and finally cooling the sphere-containing semi-solid mixture to a temperature at which the sphere-containing semi-solid mixture becomes solid and the product is formed.

US Patent:

20130272947, Oct 17, 2013

Filed:

Mar 8, 2013

Appl. No.:

13/791549

Inventors:

Syed B. Qadri - Fairfax Station VA, US
Arne W. Fliflet - Alexandria VA, US
M. Ashraf Imam - Great Falls VA, US
Bhakta B. Rath - Oakton VA, US

Assignee:

The Government of the United States of America, as represented by the Secretary of the Navy - Washington DC

International Classification:

C01B 31/36

US Classification:

423345, 977896

Abstract:

This disclosure concerns a method of making silicon carbide involving adding one from the group of rice husk material, sorghum, peanuts, maple leaves, and/or corn husk material to a container, creating a vacuum or an inert atmosphere inside the container, applying conventional heating or microwave heating, heating rapidly, and reacting the material and forming silicon carbide (SiC).

US Patent:

7632565, Dec 15, 2009

Filed:

Apr 28, 1997

Appl. No.:

08/845897

Inventors:

M. Ashraf Imam - Great Falls VA, US
Bhakta B. Rath - Oakton VA, US
Teddy M. Keller - Alexandria VA, US

Assignee:

The United States of America as represented by the Secretary of the Navy - Washington DC

International Classification:

B32B 5/18

US Classification:

4283073, 4283193, 4283197, 4283105, 4283128, 428545, 428547, 428550, 428613, 428615, 428624, 428650

Abstract:

Metal foams are impregnated with resins. The metal foam/polymer composite formed upon curing has excellent acoustic dampening and structural properties. Foams of various metals, such as aluminum, titanium, nickel, copper, iron, zinc, lead, silver, gold, platinum, tantalum, and alloys based on these metals, may be used. The polymer component may be any polymeric resin, for example, epoxy, natural rubber, acrylic, or phenolic.

US Patent:

20210045417, Feb 18, 2021

Filed:

Oct 27, 2020

Appl. No.:

17/081216

Inventors:

- Arlington VA, US
Bhakta B. Rath - Oakton VA, US

Assignee:

The Government of the United States of America, as represented by the Secretary of the Navy - Arlington VA

International Classification:

A23L 25/00
B02C 17/20
B82Y 30/00
C01B 21/072

Abstract:

Nano-structures of Aluminum Nitride and a method of producing nano-structures of Aluminum Nitride from nut shells comprising milling agricultural nuts into a fine nut powder, milling nanocrystalline AlOinto a powder, mixing, pressing the fine nut powder and the powder of nanocrystalline AlO, heating the pellet, maintaining the temperature of the pellet at about 1400 C., cooling the pellet, eliminating the residual carbon, and forming nano-structures of AlN. An Aluminum Nitride (AlN) product made from the steps of preparing powders of agricultural nuts using ball milling, preparing powders of nanocrystalline AlO, mixing the powders of agricultural nuts and the powders of nanocrystalline AlOforming a homogenous sample powder of agricultural nuts and AlO, pressurizing, pyrolyzing the disk, and reacting the disk and the nitrogen atmosphere and forming AlN.

US Patent:

20190261664, Aug 29, 2019

Filed:

May 8, 2019

Appl. No.:

16/406969

Inventors:

- Arlington VA, US
Bhakta B. Rath - Oakton VA, US

Assignee:

The Government of the United States of America, as represented by the Secretary of the Navy - Arlington VA

International Classification:

A23L 25/00
B82Y 30/00
C01B 21/072
B02C 17/20

Abstract:

A method of producing Aluminum Nitride comprising milling nuts into a powder, milling a powder of nanocrystalline AlO, mixing, pressing into a pellet, providing nitrogen, heating, and forming AlN. An Aluminum Nitride product from preparing powders of nuts and AlO, mixing, and forming a powder, pressurizing into a disk, pyrolizing in nitrogen, and forming AlN in a pure form and in the wurtzite phase. An Aluminum Nitride (AlN) from preparing powders of agricultural nuts, preparing powders of nanocrystalline AlO, mixing the powders and thereby forming a homogenous sample powder of agricultural nuts and AlO, pressurizing the homogenous sample powder into a disk, heat treating or pyrolizing the disk in a nitrogen atmosphere, reacting the disk and the nitrogen atmosphere and forming AlN, and wherein the AlN is nano-structured AlN and in a pure form and in the wurtzite phase of AlN.

US Patent:

20190169028, Jun 6, 2019

Filed:

Feb 4, 2019

Appl. No.:

16/267187

Inventors:

- Arlington VA, US
Bhakta B. Rath - Oakton VA, US

Assignee:

The Government of the United States of America, as represented by the Secretary of the Navy - Arlington VA

International Classification:

C01B 21/068

Abstract:

SiNnanotubes and nanorods wherein the nanotubes and nanorods of silicon nitride are pure α-SiNformed by carbothermal reduction of SiOfrom reacting agricultural husk material in heat and forming the silicon nitride nanotubes and nanorods.

US Patent:

20180134560, May 17, 2018

Filed:

Oct 17, 2017

Appl. No.:

15/786180

Inventors:

- Arlington VA, US
Bhakta B. Rath - Oakton VA, US

Assignee:

The Government of the United States of America, as represented by the Secretary of the Navy - Arlington VA

International Classification:

C01B 21/072
C01F 7/02
A23L 25/00
B22F 9/04
B22F 9/30
B22F 3/10
B22F 1/00
B02C 17/20
B82Y 30/00

Abstract:

A method of making Aluminum Nitride (AlN) from nut shells comprising preparing powders of agricultural nuts, preparing powders of nanocrystalline AlO, mixing the powders and thereby forming a homogenous sample powder of agricultural nuts and AlO, pressurizing the homogenous sample powder into a disk, heat treating or pyrolyzing the disk in a nitrogen atmosphere, reacting the disk and the nitrogen atmosphere and forming AlN, and wherein the AlN is nano-structured AlN and in a pure form and in the wurtzite phase of AlN. A method of producing Aluminum Nitride comprising milling nuts into a powder, milling a powder of nanocrystalline AlO, mixing, pressing into a pellet, providing nitrogen, heating, and forming AlN. An Aluminum Nitride product from preparing powders of nuts and AlO, mixing, and forming a powder, pressurizing into a disk, pyrolyzing in nitrogen, and forming AlN.

US Patent:

20180134569, May 17, 2018

Filed:

Oct 17, 2017

Appl. No.:

15/786245

Inventors:

- Arlington VA, US
Bhakta B. Rath - Oakton VA, US

Assignee:

The Government of the United States of America, as represented by the Secretary of the Navy - Arlington VA

International Classification:

C01B 33/20

Abstract:

A method of making Nanostructured Zinc Silicate from renewable sources comprising preparing powders of husks, preparing powders of ZnO, mixing the powders of husks and the powders of ZnO and forming a homogenous sample powder, pressing the homogenous sample and forming pellets, heating the pellets and forming nanostructured zinc silicate. The nanostructured zinc silicate from renewable sources product of the process of preparing powders of husks, preparing powders of ZnO, mixing the powders of husks and the powders of ZnO and forming a homogenous sample powder, pressing the homogenous sample and forming pellets, heating the pellets and forming nanostructured zinc silicate.