Vinay K Gupta

US Patent:

8158005, Apr 17, 2012

Filed:

Nov 3, 2008

Appl. No.:

12/263799

Inventors:

Vinay Gupta - Tampa FL, US
Maya Trotz - Tampa FL, US
Cecil Coutinho - Tampa FL, US

Assignee:

University of South Florida - Tampa FL

International Classification:

C02F 1/28
C02F 1/32

US Classification:

210668, 210669, 210734, 21074814, 210763, 210766

Abstract:

Microcomposites comprising titanium dioxide (TiO2) nanoparticles embedded within cross-linked, thermally responsive microgels of poly(N-isopropylacrylamide) are disclosed. Interpenetrating linear chains of poly(acrylic acid) functionalize the nanoparticles for dispersal within the microgel framework. The microcomposites show rapid sedimentation, which is useful for gravity separation applications such as environmental remediation via photocatalytic degradation. The extent of loading of the TiO2 within the colloidal particles can be easily manipulated from 10% (weight) to a value as high as 75%. The microgel-titania composites showed rapid sedimentation, which is useful for gravity separation of these particles in photocatalytic applications. The settling of the microgel-titania composites occurred over minutes and was much faster than solid, impermeable spheres. As the content of TiO2 increased within the particles from 10% to 75%, the increased effective particle density led to significant decrease in the settling time from approximately 2200 seconds to approximately 100 seconds.

US Patent:

8246911, Aug 21, 2012

Filed:

Jan 9, 2002

Appl. No.:

10/044899

Inventors:

Nicholas L. Abbott - Madison WI, US
Justin J. Skaife - Lafayette CA, US
Vinay K. Gupta - Tampa FL, US
Timothy B. Dubrovsky - Flemington NJ, US
Rahul Shah - Woodburg MN, US

Assignee:

The Regents of the University of California - Oakland CA

International Classification:

G01N 21/75
G01N 33/53
G01N 27/00
G02F 1/1337
G02F 1/13

US Classification:

422 8205, 422412, 422 8201, 435 71, 435 74, 436501, 436524, 436528, 436805

Abstract:

Interactions between molecules that are components of self-assembled monolayers and other molecules can be amplified and transduced into an optical signal through the use of a mesogenic layer. The invention provides for a method for detecting an analyte, comprising contacting with said analyte a recognition moiety for said analyte, wherein said contacting causes at least a portion of a plurality of mesogens proximate to said recognition moiety to detectably switch from a first orientation to a second orientation upon contacting said analyte with said recognition moiety; and detecting said second orientation of said at least a portion of said plurality of mesogens, whereby said analyte is detected.

US Patent:

20090013609, Jan 15, 2009

Filed:

Oct 29, 2007

Appl. No.:

11/926826

Inventors:

Vinay Gupta - Tampa FL, US
Ashok Kumar - Tampa FL, US
Cecil Coutinho - Tampa FL, US
Subrahmanya Mudhivarthi - Tampa FL, US

Assignee:

UNIVERSITY OF SOUTH FLORIDA - Tampa FL

International Classification:

C09G 1/02
C09K 13/00

US Classification:

51309, 216 89, 51307, 252 791

Abstract:

Organic-inorganic composites were prepared as colloidal particles of a cross-linked, thermally responsive polymer. Hybrid PNIPAM-polysiloxane particles and composite polymeric particles with embedded nanoparticles of an inorganic metal-oxide (MO) such as CeO2 and TiO2 were formed. To promote the incorporation of unaggregated nanoparticles, temperature responsive microspherical gels (microgels) of N-isopropylacrylamide (NIPAM) with interpenetrating (IP) linear chains of poly(acrylic acid) (PAA) were used. The organic-inorganic composition of the hybrid polymer network was controlled by changing the time for condensation and hydrolysis of the siloxane monomer during synthesis. Experimental results indicated that the planarization of silicon oxide wafers using these hybrid particles and composites exhibited lower topographical variations and surface roughness as compared to slurries consisting of only silica or ceria nanoparticles while achieving similar removal rates and better or similar frictional characteristics.

US Patent:

20180189764, Jul 5, 2018

Filed:

Feb 27, 2018

Appl. No.:

15/906100

Inventors:

- Dublin, IE
Vinay Gupta - Briarcliff Manor NY, US

International Classification:

G06Q 20/22
G06Q 20/40
G06Q 40/08
G06Q 30/02

Abstract:

A system and method for booking peer-to-peer asset transactions, dynamically assessing risk associated with the transactions, and generating custom insurance policies for the transactions. A risk profile is created for the asset, an owner of the asset, and a potential renter of the asset based on data about the asset, data about the owner, and data about the potential renter, respectively. A risk analysis is performed based the risk profiles of the asset, asset owner, and potential renter, and other information, such as a duration and a location associated with the transaction. This risk analysis is used to provide an insurance premium for the transaction and generate a custom insurance policy when the transaction is booked. Payment may also be taken to complete the transaction.

US Patent:

20160155110, Jun 2, 2016

Filed:

Dec 23, 2013

Appl. No.:

14/652551

Inventors:

- Dublin, 8, IE
Vinay Gupta - Briarcliff Manor NY, US

International Classification:

G06Q 20/22
G06Q 20/40
G06Q 40/08

Abstract:

A system and method for booking peer-to-peer asset transactions, dynamically assessing risk associated with the transactions, and generating custom insurance policies for the transactions. A risk profile is created for the asset, an owner of the asset, and a potential renter of the asset based on data about the asset, data about the owner, and data about the potential renter, respectively. A risk analysis is performed based the risk profiles of the asset, asset owner, and potential renter, and other information, such as a duration and a location associated with the transaction. This risk analysis is used to provide an insurance premium for the transaction and generate a custom insurance policy when the transaction is booked. Payment may also be taken to complete the transaction.