Raghavendra R Adharapurapu

20130315659, Nov 28, 2013

Sep 27, 2012

13/628548

Raghavendra Rao Adharapurapu - Schenectady NY, US
Mohamed Rahmane - Ballston Lake NY, US

General Electric Company - Schenectady NY

B23K 35/24
H01M 10/02
C22C 30/00
B23K 1/20
C22C 19/05

403272, 228256, 420442, 420451, 420444, 420452, 420445, 420588, 4205841

A braze alloy composition is disclosed, containing nickel, about 5% to about 40% of at least one refractory metal selected from niobium, tantalum, or molybdenum; about 2% to about 32% chromium; and about 0.5% to about 10% of at least one active metal element. An electrochemical cell that includes two components joined to each other by such a braze composition is also described. A method for joining components such as those within an electrochemical cell is also described. The method includes the step of introducing a braze alloy composition between a first component and a second component to be joined, to form a brazing structure. In many instances, one component is formed of a ceramic, while the other is formed of a metal or metal alloy.

20130316222, Nov 28, 2013

Jun 29, 2012

13/538203

Raghavendra Rao Adharapurapu - Schenectady NY, US
Sundeep Kumar - Bangalore, IN
Mohamed Rahmane - Ballston Lake NY, US

GENERAL ELECTRIC COMPANY - SCHENECTADY NY

C22C 9/06
H01M 4/64
C22C 9/00

429149, 420485, 420488, 420487, 429211

A braze alloy composition for sealing a ceramic component to a metal component in an electrochemical cell is presented. The braze alloy composition includes copper, nickel, and an active metal element. The braze alloy includes nickel in an amount less than about 30 weight percent, and the active metal element in an amount less than about 10 weight percent. An electrochemical cell using the braze alloy for sealing a ceramic component to a metal component in the cell is also provided.

20130316226, Nov 28, 2013

Aug 31, 2012

13/600333

Raghavendra Rao Adharapurapu - Schenectady NY, US
Sundeep Kumar - Bangalore, IN
Mohamed Rahmane - Ballston Lake NY, US

GENERAL ELECTRIC COMPANY - SCHENECTADY NY

B23K 35/24
C22C 19/05
H01M 2/08
C22C 19/03

429185, 420441, 420442, 420459, 403272

A braze alloy composition for sealing a ceramic component to a metal component in an electrochemical cell is presented. The braze alloy composition includes nickel, silicon, boron, and an active metal element. The braze alloy includes nickel in an amount greater than about 50 weight percent, and the active metal element in an amount less than about 10 weight percent. An electrochemical cell using the braze alloy for sealing a ceramic component to a metal component in the cell is also provided.

20140069988, Mar 13, 2014

Sep 12, 2012

13/610941

Sundeep KUMAR - Bangalore, IN
Raghavendra ADHARAPURAPU - Niskayuna NY, US
Mamatha NAGESH - Shimoga, IN
Kalaga Murali KRISHNA - Bangalore, IN
Jeffrey KERCHNER - Schenectady NY, US
Laurent CRETEGNY - Niskayuna NY, US
Mohamed RAHMANE - Niskayuna NY, US

GENERAL ELECTRIC COMPANY - Schenectady NY

B23K 31/02

2281221

The present disclosure generally relates to methods of using active braze techniques in high temperature rechargeable batteries. In some specific embodiments, the present disclosure relates to a method of sealing a portion of an insulated alpha alumina or spinel collar and a metal ring of a sodium metal halide battery.

20130224561, Aug 29, 2013

Feb 29, 2012

13/407870

Raghavendra Rao Adharapurapu - Schenectady NY, US
Sundeep Kumar - Bangalore, IN
Mohamed Rahmane - Ballston Lake NY, US

GENERAL ELECTRIC COMPANY - SCHENECTADY NY

H01M 2/08
B23K 35/12
H01M 10/04
B23K 31/02
B23K 35/24
C22C 19/03
C22C 19/05

429149, 420441, 420456, 420457, 420459, 420442, 228256, 228246, 429122

A braze alloy composition for sealing a ceramic component to a metal component in an electrochemical cell is presented. The braze alloy composition includes nickel, germanium, and an active metal element. The braze alloy includes germanium in an amount greater than about 5 weight percent, and the active metal element in an amount less than about 10 weight percent. A method for sealing a ceramic component to a metal component in an electrochemical cell and, an electrochemical cell sealed thereby, are also provided.

20140186691, Jul 3, 2014

Dec 28, 2012

13/729343

- Schenectady NY, US
Reza SARRAFI-NOUR - Niskayuna NY, US
Badri Narayan RAMAMURTHI - Niskayuna NY, US
Mohandas NAYAK - Bangalore, IN
Darren Michael STOHR - Niskayuna NY, US
Sundeep KUMAR - Bangalore, IN
Mohamed RAHMANE - Niskayuna NY, US
Arunabh BASAK - Bangalore, IN
Raghavendra Rao ADHARAPURAPU - Niskayuna NY, US

GENERAL ELECTRIC COMPANY - Schenectady NY

H01M 2/08

429185, 277654, 296232

The present application provides for ceramic collars and metal rings for active brazing in sodium-based thermal batteries. The ceramic collar may be an alpha-alumina collar configured for active brazing, and thereby sealing, to outer and inner Ni rings for use in NaMx cells. The portions of the alpha-alumina collar active brazed to the outer and inner Ni rings may be outwardly facing and include inwardly extending recesses. The portions of the outer and inner Ni rings active brazed to the outwardly facing portions of the collar may be inwardly facing. The alpha-alumina collar may include a greater coefficient of thermal expansion than each of the outer and inner Ni rings, and the alpha-alumina collar and outer and inner Ni rings may be configured such that a portion of the outer and inner Ni rings is deformed into the inwardly extending recesses of the alpha-alumina collar after active brazing thereof.

20140170015, Jun 19, 2014

Dec 17, 2012

13/716334

- Schenectady NY, US
Andrew David Deal - Niskayuna NY, US
Voramon Supatarawanich Dheeradhada - Latham NY, US
Judson Sloan Marte - Wynantskill NY, US
Raghavendra Rao Adharapurapu - Schenectady NY, US

GENERAL ELECTRIC COMPANY - Schenectady NY

C22C 38/46
C22C 38/02
C22C 38/44
C22C 38/06
C22C 38/42
C22C 38/00
C22C 38/04

420 91, 1662421

A steel composition resistant to sulfidic corrosion has been discovered. The newly discovered steel composition comprises the elements Fe, C, Si, Cu, and Mn wherein the composition comprises from about 96.80 to about 99.00 percent by weight iron, from about 0.10 to about 0.30 percent by weight carbon, from about 0.20 to about 1.40 percent by weight silicon, from about 0.50 to about 1.50 percent by weight copper, and from about 0.20 to about 1.00 percent by weight manganese, wherein the composition is substantially free of chromium, and wherein the composition contains less than 0.1 percent by weight nickel, molybdenum, or tungsten.

20140157793, Jun 12, 2014

Dec 7, 2012

13/707756

- Schenectady NY, US
Min Zou - Niskayuna NY, US
Ming Yin - Rexford NY, US
Raghavendra Rao Adharapurapu - Schenectady NY, US
Christopher Klapper - Glenville NY, US
Vijay Kumar Srivastava - Schenectady NY, US

GENERAL ELECTRIC COMPANY - Schenectady NY

C09K 5/00
F25B 21/00

62 31, 252 67

A novel magneto caloric material (MCM) is provided that can be used in, for example, a regenerator of a heat pump, appliance, air conditioning system, and other heating and/or cooling devices. The MCM is a type of Heusler alloy, has an L2crystal structural prototype, and can undergo a reversible phase transformation between a low temperature, low magnetization Martensite phase and a high temperature, high magnetization Austenite phase to exhibit an inverse magneto caloric effect upon application of a sufficient magnetic field. A process of annealing of the alloy is also provided that can be used to adjust the temperature at which this phase transformation occurs. The present invention includes the alloy as subjected to such annealing.