Vikas B Gupta

US Patent:

6533905, Mar 18, 2003

Filed:

Jan 24, 2001

Appl. No.:

09/768700

Inventors:

A. David Johnson - San Leandro CA
Valery V. Martynov - San Francisco CA
Vikas Gupta - San Leandro CA
Arani Bose - New York City NY

Assignee:

TiNi Alloy Company - San Leandro CA
Smart Therapeutics, Inc. - San Leandro CA

International Classification:

C23C 1434

US Classification:

20419215

Abstract:

A thin film device, such as an intravascular stent, is disclosed. The device is formed of a seamless expanse of thin-film (i) formed of a sputtered nitinol shape memory alloy, defining, in an austenitic state, an open, interior volume, having a thickness between 0. 5-50 microns, having an austenite finish temperature A below 37Â C. ; and demonstrating a stress/strain recovery greater than 3% at 37Â C. The expanse can be deformed into a substantially compacted configuration in a martensitic state, and assumes, in its austenitic state, a shape defining such open, interior volume. Also disclosed is a sputtering method for forming the device.

US Patent:

6624730, Sep 23, 2003

Filed:

Mar 28, 2001

Appl. No.:

09/821840

Inventors:

A. David Johnson - San Leandro CA
Vikas Galhotra - Union City CA
Vikas Gupta - San Leandro CA
Valery Martynov - San Francisco CA

Assignee:

TiNi Alloy Company - San Leandro CA

International Classification:

H01H 5122

US Classification:

335 78, 335 83

Abstract:

A microrelay device formed on a silicon substrate wafer for use in opening and closing a current path in a circuit. A pair of electrically conducting latching beams are attached at their proximal ends to terminals on the substrate. Proximal ends of the beams have complementary shapes which releasably fit together to latch the beams and close the circuit. A pair of shape memory alloy actuators are selectively operated to change shapes which bend one of the beams in a direction which latches the distal ends, or bend the other beam to release the distal ends and open the circuit. The microrelay is bistable in its two positions, and power to the actuators is applied only for switching it open or closed.

US Patent:

6746890, Jun 8, 2004

Filed:

Jul 17, 2002

Appl. No.:

10/198654

Inventors:

Vikas Gupta - San Leandro CA
A. David Johnson - San Leandro CA
Letecia Menchaca - Berkeley CA
Valery Martynov - San Francisco CA

Assignee:

TiNi Alloy Company - San Leandro CA

International Classification:

H01L 2100

US Classification:

438 50, 438 51, 438 52, 438 53

Abstract:

Methods for making thin film multiple layered three-dimensional devices using two-dimensional MEMS techniques for use in a variety of applications including endovascular, endolumenal, intracranial, and intraocular medical applications. In the general method, a thin film first layer of the device material is deposited over a release layer which in turn is deposited on a substrate. An other release layer is deposited on the first device layer, with portions of the other release layer removed, leaving a pattern in the first device layer. In a similar manner a second layer of device material is formed in a pattern overlying the first device layer with portions of the two layers joined together leaving a portion of the release layer between them. The two release layers are removed and the first and second layers of the device material are formed into a three-dimensional shape suitable for the desired end-use application.

US Patent:

6779093, Aug 17, 2004

Filed:

Feb 15, 2002

Appl. No.:

10/077330

Inventors:

Vikas K. Gupta - Santa Clara CA

Assignee:

VERITAS Operating Corporation - Mountain View CA

International Classification:

G06F 1206

US Classification:

711162, 711135, 711143, 711147, 711165, 709202, 709204, 709207, 709223, 709225, 709226, 709229, 710 5, 710 21, 710 33, 710 46, 714 5, 714 6

Abstract:

A control facility that allows a non-programmer to use and manipulate replicated data without disrupting replication of the data itself. The control facility can be used and customized for a variety of software applications and storage platforms to perform off-host processing of the replicated data. In response to a single user command during replication of data from a primary node to a secondary node, a control message is obtained from the primary node and a control command associated with the control message is automatically executed on the secondary node. A portion of the data is diverted from first storage at the secondary node to second storage in response to obtaining the control message, the portion of the data is copied to the first storage in response to completing the execution of the control command, and the data is automatically re-directed to the first storage in response to completing the copying.

US Patent:

6790298, Sep 14, 2004

Filed:

Jul 10, 2001

Appl. No.:

09/902856

Inventors:

A. David Johnson - San Leandro CA
Vikas Galhotra - Union City CA
Vikas Gupta - San Leandro CA

Assignee:

TiNi Alloy Company - San Leandro CA

International Classification:

C22C 4500

US Classification:

148561, 148563

Abstract:

Methods of fabricating a free standing thin film of shape memory alloy material, and products made by the methods. A sacrificial layer of a metallic material is deposited onto the surface of a substrate. Then an amorphous shape memory alloy is sputter deposited onto the outer surface of the sacrificial layer. The sacrificial layer is etched away, leaving the thin film free standing, that is separated from the substrate. The thin film is annealed by heating into a crystalline state, with the annealing step carried out either after the film has been separated from the substrate, or while remaining attached to it.

US Patent:

7084726, Aug 1, 2006

Filed:

Sep 15, 2003

Appl. No.:

10/661035

Inventors:

Vikas Gupta - San Leandro CA, US
Valery Martynov - San Francisco CA, US

Assignee:

TiNi Alloy Company - San Leandro CA

International Classification:

H01H 51/22

US Classification:

335 78, 335 73

Abstract:

A microrelay device formed on a silicon substrate wafer for use in opening and closing a current path in a circuit. A pair of electrically conducting latching beams are attached at their proximal ends to terminals on the substrate. Proximal ends of the beams have complementary shapes which releasably fit together to latch the beams and close the circuit. A pair of shape memory alloy actuators are selectively operated to change shapes which bend one of the beams in a direction which latches the distal ends, or bend the other beam to release the distal ends and open the circuit. The microrelay is bistable in its two positions, and power to the actuators is applied only for switching it open or closed.

US Patent:

7191284, Mar 13, 2007

Filed:

Sep 4, 2003

Appl. No.:

10/655264

Inventors:

Vikas K. Gupta - Santa Clara CA, US
Ming Xu - San Ramon CA, US
Kedar M. Karmarkar - Sunnyvale CA, US

Assignee:

Veritas Operating Corporation - Mountain View CA

International Classification:

G06F 10/00

US Classification:

711114

Abstract:

Disclosed is a method and system for performing periodic replication using a log and a change map. According to one embodiment, a first region and a second region of a primary data volume are identified and a plurality of write operations to the primary data volume are tracked by tracking write operations to the first region utilizing a storage replication log and tracking write operations to the second region utilizing a storage replication change map. Thereafter, data associated with the plurality of write operations is replicated from the primary data volume to a secondary data volume utilizing at least one of the storage replication log and the storage replication change map.

US Patent:

7191299, Mar 13, 2007

Filed:

May 12, 2003

Appl. No.:

10/436354

Inventors:

Anand K. Kekre - Pune, IN
Ronald S. Karr - Palo Alto CA, US
John A. Colgrove - Los Altos CA, US
Kedar M. Karmarkar - Sunnyvale CA, US
Raghu Krishnamurthy - Cupertino CA, US
Saurabh R. Godbole - Pune, IN
Ming Xu - San Ramon CA, US
Vikas K. Gupta - Santa Clara CA, US
Deepak Tawri - Pune, IN

Assignee:

Veritas Operating Corporation - Mountain View CA

International Classification:

G06F 12/00

US Classification:

711162, 711161, 707204

Abstract:

A method and system of providing periodic replication is disclosed. According to one embodiment, a method is provided which comprises creating a storage object corresponding to a data volume, wherein the storage object comprises a point-in-time copy of the data volume and a data volume map; and replicating the data volume utilizing the storage object.