Divyaraj Desai

US Patent:

20200188879, Jun 18, 2020

Filed:

Dec 5, 2019

Appl. No.:

16/704299

Inventors:

- Palo Alto CA, US
DIVYARAJ DESAI - FREMONT CA, US
JESSICA LOUIS BAKER RIVEST - PALO ALTO CA, US

International Classification:

B01J 20/28
B01J 20/26
B01J 20/32
E04B 2/00

Abstract:

A composite particle includes a solid particle, and a coating directly on the solid particle, the coating comprising a water-absorbing material. A layer includes a plurality of composite particles in contact, wherein the composite particles are comprised of: a solid particle; and a coating directly on the solid particle, the coating comprising a water-absorbing material. A method of fabricating composite particles includes combining solid particles with at least one precursor, cross-linker, and radical initiator in a solution to cause polymerization and formation of a water-absorbing coating on the solid particles resulting in composite particles, removing the solution and any unreacted precursors, and drying the composite particles. A method of forming composite particles includes mixing solid particles with at least one adhesive and with premade water-absorbing super absorbent polymer particles, curing the adhesive to form a monolithic block of solid particles with water-absorbing polymer coatings, and grinding the block to obtain composite particles.

US Patent:

20190240623, Aug 8, 2019

Filed:

Nov 26, 2018

Appl. No.:

16/200289

Inventors:

- Palo Alto CA, US
Divyaraj Desai - Sunnyvale CA, US
Michael Benedict - Palo Alto CA, US
Jessica Louis Baker Rivest - Palo Alto CA, US

International Classification:

B01D 61/46
C02F 1/469
H01M 8/18
H01M 8/22

Abstract:

A system comprises an electrodialysis apparatus, which includes first and second reservoirs, wherein a salt concentration in the first reservoir reduces below a threshold concentration, and salt concentration in the second reservoir increases during an operation mode. A first electrode comprises a first solution of a first redox-active electrolyte material, and a second electrode comprises a second solution of a second redox-active electrolyte material. In a first reversible redox reaction between the first electrode and first electrolyte material at least one ion is accepted from the first reservoir, and in a second reversible redox reaction between the second electrode and second electrolyte material at least one ion is driven into the second reservoir. A first type of ion exchange membrane is disposed between the first and second reservoirs, and a second type of ion exchange membrane, different from the first type, is disposed between the respective electrodes and reservoirs.

US Patent:

20180141828, May 24, 2018

Filed:

Nov 18, 2016

Appl. No.:

15/356340

Inventors:

- Palo Alto CA, US
Jessica Louis Baker RIVEST - Palo Alto CA, US
Armin R. VOLKEL - Mountain View CA, US
Divyaraj DESAI - Sunnyvale CA, US

International Classification:

C02F 1/28
B01J 20/26
B01J 20/28

Abstract:

A porous material including polymerized units containing pores is provided, which can be employed for desalination applications. Each of the units includes at least one aromatic amino group and at least one hydroxyl group. The aromatic amino groups and the hydroxyl groups are arranged on surfaces of the pores in geometries configured to capture sodium chloride from an aqueous environment. The porous material can be provided as particles or a sponge. The porous material can be manufactured from a solution including monomers, a porogen, and an initiator by a polymerization process. The porous material can be reused after a desalination process by treatment with deionized water. A steam generation apparatus can be employed to facilitate removal of sodium chloride from the porous material in which sodium chloride is captured.

US Patent:

20160365596, Dec 15, 2016

Filed:

Jun 15, 2015

Appl. No.:

14/740203

Inventors:

- Palo Alto CA, US
Jessica Louis Baker RIVEST - Palo Alto CA, US
Divyaraj DESAI - San Jose CA, US
Vedasri VEDHARATHINAM - Sunnyvale CA, US
Saroj Kumar SAHU - Fremont CA, US

International Classification:

H01M 8/18
H02J 7/00
H01M 8/20
C02F 1/469

Abstract:

An energy storage system employing a reversible salination-desalination process includes an electrochemical desalination battery (EDB) unit including an anode and a cathode. The EDB unit runs a salination process while storing energy from a direct current power supply unit, and runs a desalination process while releasing energy to an electrical load. The energy storage system can store power from a variable output electrical power supply unit such as solar cells and wind turbines while running a salination process, and release energy, e.g., during peak energy demand hours while running a desalination process. Combined with a capacitive deionization (CD) unit, the energy storage system can generate fresh water by running desalination processes in the EDB unit and the CD unit while releasing stored energy from the EDB unit. The energy storage unit can function as a dual purpose device for energy storage (load shifting) and fresh water generation.

US Patent:

20160245773, Aug 25, 2016

Filed:

Feb 19, 2015

Appl. No.:

14/626332

Inventors:

- Palo Alto CA, US
Saroj Sahu - Fremont CA, US
Sean Garner - San Francisco CA, US
Ranjeet Rao - Redwood City CA, US
Ashutosh Kole - San Francisco CA, US
Vedasri Vedharathinam - San Jose CA, US
Divyaraj Desai - San Jose CA, US
Jessica Louis Baker Rivest - Palo Alto CA, US
Richard Steele - Newark CA, US
Martin J. Sheridan - Redwood City CA, US

International Classification:

G01N 27/31
G01N 27/38
G01N 27/413

Abstract:

Disclosed is an electrochemical probe system and an electrical excitation method, configured in a handheld sorting system, and used to identify the composition of metals and alloys.

US Patent:

20160245775, Aug 25, 2016

Filed:

Feb 19, 2015

Appl. No.:

14/626092

Inventors:

- Palo Alto CA, US
Saroj Sahu - Fremont CA, US
Sean Garner - San Francisco CA, US
Ranjeet Rao - Redwood City CA, US
Ashutosh Kole - San Francisco CA, US
Vedasri Vedharathinam - San Jose CA, US
Divyaraj Desai - San Jose CA, US
Jessica Louis Baker Rivest - Palo Alto CA, US
Richard Steele - Newark CA, US
Martin J. Sheridan - Redwood City CA, US

International Classification:

G01N 27/333
G01N 27/31

Abstract:

Disclosed is an electrochemical probe system and an electrical excitation method, configured in a bulk sorting system, and used to identify the composition of metals and alloys.

US Patent:

20160178563, Jun 23, 2016

Filed:

Dec 19, 2014

Appl. No.:

14/576309

Inventors:

- Palo Alto CA, US
Craig Eldershaw - Belmont CA, US
Vedasri Vedharathinam - San Jose CA, US
Divyaraj Desai - San Jose CA, US
Jessica Louis Baker Rivest - Palo Alto CA, US
Ranjeet Rao - Redwood City CA, US

International Classification:

G01N 27/333
G01N 27/38
G01N 27/30

Abstract:

Disclosed is an electrochemical probe system and an electrical excitation method, used to identify the composition of metals and alloys.

US Patent:

20150274555, Oct 1, 2015

Filed:

Jun 15, 2015

Appl. No.:

14/740202

Inventors:

- Palo Alto CA, US
Jessica Louis Baker RIVEST - Palo Alto CA, US
Divyaraj DESAI - San Jose CA, US
Vedasri VEDHARATHINAM - Sunnyvale CA, US
Saroj Kumar SAHU - Fremont CA, US

International Classification:

C02F 1/469

Abstract:

An energy storage system employing a reversible salination-desalination process includes an electrochemical desalination battery (EDB) unit including an anode and a cathode. The EDB unit runs a salination process while storing energy from a direct current power supply unit, and runs a desalination process while releasing energy to an electrical load. The energy storage system can store power from a variable output electrical power supply unit such as solar cells and wind turbines while running a salination process, and release energy, e.g., during peak energy demand hours while running a desalination process. Combined with a capacitive deionization (CD) unit, the energy storage system can generate fresh water by running desalination processes in the EDB unit and the CD unit while releasing stored energy from the EDB unit. The energy storage unit can function as a dual purpose device for energy storage and fresh water generation.