Amit Gupta

US Patent:

6840251, Jan 11, 2005

Filed:

Apr 8, 2003

Appl. No.:

10/409220

Inventors:

Jasbir S. Gill - Naperville IL, US
Amit Gupta - Aurora IL, US

Assignee:

Nalco Company - Naperville IL

International Classification:

B08B 900

US Classification:

134 2212, 423477, 423478, 210749, 210753, 210754, 210755, 210756, 210764, 422 28, 422 32, 166311, 134 221, 134 2211, 134 2214, 134 2216, 134 2218, 134 2219, 134 26, 134 28, 134 29, 134 34, 134 36, 134 41

Abstract:

On-Line and Off-Line methods of simultaneously cleaning and disinfecting an industrial water system are described and claimed. The methods involve the addition to the water of the industrial water system of a Compound selected from the group consisting of the alkali salts of chlorite and chlorate and mixtures thereof; and an acid, followed by allowing the water in the industrial water system to circulate for several hours. The reaction of the alkali salts of chlorite and chlorate and acid produces chlorine dioxide in-situ in the water of the industrial water system. The chlorine dioxide kills microorganisms and the acid acts to remove deposits upon the water-contact surfaces of the equipment. An alternative method involves the use of a chelating agent and a biocide. Other possible cleaning and disinfection reagents may be added as needed including corrosion inhibitors, chelating agents, biocides, surfactants and reducing agents.

US Patent:

7201178, Apr 10, 2007

Filed:

Oct 21, 2004

Appl. No.:

10/970594

Inventors:

Amit Gupta - Aurora IL, US
David A. Grattan - Bolingbrook IL, US

Assignee:

Nalco Company - Naperville IL

International Classification:

F16K 11/02

US Classification:

137 1, 137113, 137256, 137263, 137434, 222 67

Abstract:

A method of providing a continuous, sequential, and cyclic, if desired, liquid feed to a processor from a plurality of containers, which comprises feeding the liquid from a first of the containers through a first conduit to a reservoir having a float valve, to keep the level of the liquid in the reservoir high enough to maintain the float valve in an upper floating position that closes the float valve. The first conduit is uncontrolled by the float valve. The float valve controls a second conduit which connects with a second container. As liquid is withdrawn from the reservoir for processing, liquid from the first conduit and container replenishes the reservoir until it is exhausted. Then, the liquid level drops, and the float valve opens the second conduit for replenishing the reservoir with liquid from the second container. A crossover valve may be used so that the float valve controls flow from either container connected to the second conduit.

US Patent:

7252096, Aug 7, 2007

Filed:

Nov 30, 2004

Appl. No.:

11/000587

Inventors:

Jasbir S. Gill - Naperville IL, US
Amit Gupta - Aurora IL, US

Assignee:

Nalco Company - Naperville IL

International Classification:

B08B 9/00

US Classification:

134 2212, 423477, 423478, 210749, 210753, 210754, 210755, 422756, 422764, 422 28, 422 32, 166311, 134 221, 134 2211, 134 2214, 134 2216, 134 2218, 134 2219, 134 26, 134 28, 134 29, 134 34, 134 36, 134 41

Abstract:

On-Line and Off-Line methods of simultaneously cleaning and disinfecting an industrial water system are described and claimed. The methods involve the addition to the water of the industrial water system of a Compound selected from the group consisting of the alkali salts of chlorite and chlorate and mixtures thereof; and an acid, followed by allowing the water in the industrial water system to circulate for several hours. The reaction of the alkali salts of chlorite and chlorate and acid produces chlorine dioxide in-situ in the water of the industrial water system. The chlorine dioxide kills microorganisms and the acid acts to remove deposits upon the water-contact surfaces of the equipment. An alternative method involves the use of a chelating agent and a biocide. Other possible cleaning and disinfection reagents may be added as needed including corrosion inhibitors, chelating agents, biocides, surfactants and reducing agents.

US Patent:

7420490, Sep 2, 2008

Filed:

Jul 31, 2006

Appl. No.:

11/461060

Inventors:

Amit Kumar Gupta - Dallas TX, US
Karthikeyan Soundarapandian - Plano TX, US

Assignee:

Texas Instruments Incorporated - Dallas TX

International Classification:

H03M 1/00

US Classification:

341122, 341155

Abstract:

The invention provides methods and systems useful for quickly and accurately sampling a switched capacitive load. Systems are disclosed in which the methods are implemented using an operational amplifier operably coupled to a pre-charge capacitor for storing an input charge. A sampling capacitor is also coupled to the operational amplifier and to the pre-charge capacitor for receiving and holding the input charge. The system is so configured for a coarse sampling phase and a fine sampling phase the to ensure that the sampling capacitor settles quickly to provides an output.

US Patent:

7453319, Nov 18, 2008

Filed:

Aug 1, 2006

Appl. No.:

11/461758

Inventors:

Amit Kumar Gupta - Dallas TX, US
Vijayakumar Dhanasekaran - Bryan TX, US
Karthikeyan Soundarapandian - Plano TX, US

Assignee:

Texas Instruments Incorporated - Dallas TX

International Classification:

H03F 3/45

US Classification:

330258, 330253

Abstract:

The invention includes methods and systems for providing a multi-path common mode feedback loop in an amplifier system. Embodiments include techniques for dividing a common mode feedback current path to provide a slow common mode feedback current path and a fast common mode feedback current path. The slow and fast paths are configured for controlling common mode feedback current within a small bandwidth.

US Patent:

8073470, Dec 6, 2011

Filed:

Mar 15, 2006

Appl. No.:

11/377902

Inventors:

Daniel G. Collins - Plano TX, US
Amit Gupta - Livermore CA, US
Jahangir Mohammed - Santa Clara CA, US

Assignee:

Jasper Wireless, Inc - Sunnyvale CA

International Classification:

H04W 68/00

US Classification:

455458, 455574

Abstract:

Improved paging for wireless networks is disclosed. A wireless terminal clock is synchronized to a server clock. A paging window and a dormant window are set for communicating between the server and the wireless terminal using the synchronized time. The paging window and the dormant window are set using a set of instructions. During the paging window, a control channel for a cellular network is found by the wireless terminal, and a page is received from the server at the wireless terminal.

US Patent:

8258863, Sep 4, 2012

Filed:

Jan 5, 2011

Appl. No.:

12/930366

Inventors:

Amit K. Gupta - Richardson TX, US
Karthikeyan Soundarapandian - Plano TX, US

Assignee:

Texas Instruments Incorporated - Dallas TX

International Classification:

H03F 1/02

US Classification:

330 9

Abstract:

A chopper-stabilized amplifier (A) includes an amplifier (), an input chopper (A) having a first input () receiving an input signal (V), an output () coupled to a first input of the amplifier, and a feedback resistor () coupled to an output () of the amplifier to couple a feedback signal (V) to a second input of the amplifier (). The input chopper operates in response to a chopping clock (CHOP_CLK). If the amplifier () is unacceptably close to a saturation condition, the chopping clock (CHOP_CLK) is disabled to reduce input leakage current (I) of the chopper-stabilized amplifier.

US Patent:

8326332, Dec 4, 2012

Filed:

Dec 2, 2011

Appl. No.:

13/310537

Inventors:

Daniel G. Collins - Plano TX, US
Amit Gupta - Livermore CA, US
Jahangir Mohammed - Santa Clara CA, US

Assignee:

Jasper Wireless, Inc. - Mountain View CA

International Classification:

H04W 68/00

US Classification:

455458, 455574

Abstract:

Improved paging for wireless networks is disclosed. A wireless terminal clock is synchronized to a server clock. A paging window and a dormant window are set for communicating between the server and the wireless terminal using the synchronized time. The paging window and the dormant window are set using a set of instructions. During the paging window, a control channel for a cellular network is found by the wireless terminal, and a page is received from the server at the wireless terminal.