Krishna Te Sapru

6340376, Jan 22, 2002

Dec 27, 1999

09/472289

Krishna Sapru - Troy MI
Subramanian Ramachandran - Troy MI
Lu Ming - Troy MI

Energy Conversion Devices, Inc. - Rochester Hills MI

C22C 102

75 1014, 75 1065, 420590

A method for combining a first metal with a second metal where the melting point of the second metal is higher than the melting point of the first metal. The first and second metals are melted in separate crucibles. The second molten metal is introduced onto or into the first molten metal. Also described is a two-zone furnace for carrying out the method.

6593017, Jul 15, 2003

Jan 30, 2002

10/059778

Zhaosheng Tan - Troy MI
Krishna Sapru - Troy MI

Energy Conversion Devices, Inc. - Rochester Hills MI

H01M 818

429 19, 429 13, 429 17, 423646, 4236481, 4236582, 423644, 419 10, 25218826

A nonreversible metal hydride for use as a hydrogen fuel. The nonreversible metal hydride is formed from an intermetallic compound having the formula Ca Li. The Ca Li is formed by melting amounts of elemental lithium and calcium together by induction heating in an argon atmosphere. The Ca Li is cooled and crushed into a powder. The alloy powder is subsequently hydrogenated at ambient temperatures or lower. Resulting is a metal hydride having exceptional reactivity to water during hydrolysis due to its nano-crystalline structure. Dehydrogenation of the metal hydride does not regularly occur due to the absorbed hydrogen being chemically bonded to the lithium and calcium. The Ca Li hydride may be used in a variety of applications as a hydrogen fuel and the Ca Li alloy may be used as a desiccant for removing moisture from hydrogen or hydrogen containing streams.

6616891, Sep 9, 2003

Sep 18, 2002

10/247536

Krishna Sapru - Troy MI
Zhaosheng Tan - Troy MI
Mohamed Bazzi - Dearborn Heights MI
Subramanian Ramachandran - Milton WA
Stanford R. Ovshinsky - Bloomfield Hills MI

Energy Conversion Devices, Inc. - Rochester Hills MI

C22C 1400

420421, 148421, 148423

A reversible hydrogen storage alloy capable of absorbing approximately 4 weight percent hydrogen and desorbing up to 2. 8 weight percent hydrogen at temperatures up to 100Â C. The hydrogen storage alloy is generally composed of titanium, vanadium, chromium, and manganese. Additional elements such as zirconium, yttrium, iron, nickel, zinc, molybdenum, and tantalum may also be included in the alloy.

6722154, Apr 20, 2004

May 9, 2003

10/435577

Zhaosheng Tan - Troy MI
Krishna Sapru - Troy MI

Energy Conversion Devices, Inc. - Rochester Hills MI

F25B 1708

62480, 62106

The present invention utilizes the hydrogen storage capabilities of hydrogen storage material to dehumidify and cool air flowing into an enclosed area, such as a residential home. The invention provides an apparatus and method that incorporates a hydrogen storage module having a low pressure, the heat retriever module, and a hydrogen storage module having a high pressure, the cooling module, wherein the modules are connected by a pipe or tube that guides the flow of hydrogen gas back and forth between the modules. The heat retriever module is heated to increase the temperature of the heat retriever module and hydrogen gas is desorbed from the hydrogen storage material contained therein, then a valve in the tube or pipe is opened and the hydrogen gas flows to the cooling module. The valve is closed, after the hydrogen gas is absorbed by the hydrogen storage material of the cooling module. The absorption of hydrogen gas causes an increase in temperature of the cooling module.

6918382, Jul 19, 2005

Aug 26, 2002

10/227764

Subramanian Ramachandran - Milton WA, US
Philip Sievers - Detroit MI, US
Eugene Kurlonko - Lapeer MI, US
Krishna Sapru - Troy MI, US
Zhaosheng Tan - Troy MI, US
Stanford R. Ovshinsky - Bloomfield Hills MI, US

Energy Conversion Devices, Inc. - Rochester Hills MI

F02B043/00

123527, 123DIG 12

A scooter powered by a hydrogen powered internal combustion engine fueled by a throttled stream of air into which a controlled amount of hydrogen is injected. A hydrogen fuel control system is used to control the amount of hydrogen injected into the throttled air stream using multiple parameters. The amount of hydrogen present in the hydrogen storage unit is monitored using an on-board hydrogen fuel measurement system utilizing a microcontroller and multiple sensors.

6920873, Jul 26, 2005

Sep 11, 2003

10/660252

Srinivasan Venkatesan - Southfield MI, US
Krishna Sapru - Troy MI, US
Boyko Aladjov - Rochester Hills MI, US

Energy Conversion Devices, Inc. - Rochester Hills MI

F24J001/00

12626305, 12626306

A portable heating pack utilizing a supercorroding metallic alloy that produces heat and gaseous hydrogen upon contacting a corroding liquid. The portable heating pack provides for the consumption and/or storage of the gaseous hydrogen rather than venting the gaseous hydrogen from the portable heating pack.

45116385, Apr 16, 1985

Jun 1, 1983

6/499900

Krishna Sapru - Troy MI
Benjamin Reichman - Birmingham MI
Gao Liang - Detroit MI

Energy Conversion Devices, Inc. - Troy MI

H01M 636
C25B 1110

429111

A photoresponsive amorphous semiconductor material is modified by incorporating at least one compensating agent selected from a group consisting of hydrogen, lithium, fluorine, beryllium, aluminum, boron, magnesium, other Group I elements, and compounds of these elements. The semiconductor material is cathodically treated either simultaneously with or subsequent to this modification. The semiconductor material may be additionally modified by incorporating a second modifying agent selected from a group consisting of silicon, the transition elements, the lanthanides, and compounds of these elements. The semiconductor material also may be subjected to heat treatment in an inert atmosphere before the cathodic treatment. A photoanode utilizing the above described semiconductor material further includes a substrate to support a film of said material. The photoanode may additionally include a second semiconductor film having a small band gap inserted between said substrate and said first semiconductor film.

46561030, Apr 7, 1987

May 20, 1985

6/736433

Benjamin Reichman - Birmingham MI
Gao Liang - Detroit MI
Krishna Sapru - Troy MI

Energy Conversion Devices, Inc. - Troy MI

H01M 636
C25B 102

429111

An amorphous silicon semiconductor alloy having multiple layers is used to form a photoelectrode (either a photoanode or a photocathode) for use in a photoelectrochemical cell for the photoelectrolysis of water to produce hydrogen or the conversion of solar energy into electrical energy. Each layer of the semiconductor alloy has a different dopant concentration ranging from no dopant to a heavy dopant concentration. The photoelectrochemical cell can utilize a photocathode and a conventional metal anode, a photoanode or both a photocathode and a photoanode according to the present invention. The semiconductor alloy of the photoelectrode is a-Si:F:H or a-Si:H. sub. x deposited on a reflective layer of aluminum or molybdenum which is deposited on a substrate of glass or stainless steel. A tunnelable oxide layer can be deposited or intrinsically formed to cover and protect the top surface of the semiconductor alloy body. The photoanode is of an n-type configuration while the photocathodes can be either a p-type or a P-I-N type configuration.