Patents by Inventor Alok Srivastava

Alok Srivastava has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 8506843
    Abstract: This disclosure features a persistent phosphor having the following formula I: Sra,Cab,BacAl2-m-n-o-pOd:Euy,REz,Bm,Znn,Coo,Scp??I where a and b each range from about 0.3 to about 0.7; c is between about 0 and about 0.1; 0.75?a+b+c+y+z?1.3; y is between about 0.0005 and about 0.1; RE is any rare earth element alone or in combination; z is between about 0.0005 and about 0.15; m is between about 0.0005 and about 0.30; n is between about 0 and about 0.10; o is between about 0 and about 0.01; p is between about 0 and about 0.10 and d ranges from about 3.945 to about 4.075. Once the persistent phosphor has been excited it appears white in an absence of ambient light. Also featured is an article of manufacture that includes the phosphor.
    Type: Grant
    Filed: December 17, 2010
    Date of Patent: August 13, 2013
    Assignee: General Electric Company
    Inventors: Alok Srivastava, Holly Ann Comanzo, Sam Camardello, William W. Beers
  • Publication number: 20130193835
    Abstract: This disclosure features fluorescent lamps that include a phosphor layer including at least one phosphor, which in the past has not been commercially usable in lamps or in some cases suffers from performance problems such as poor brightness. These problems of the phosphors were caused, for example, by mercury ion bombardment or exposure to 185 nm radiation from the discharge. These problems are expected to be avoided by coating particles of one or more of the phosphors, such as using atomic layer deposition in which the coating is not more than 500 nm in thickness. Examples of phosphors that can be coated are yttrium vanadate activated with europium or yttrium vanadate phosphate activated with europium. The coating can be selected from the group consisting of alumina, yttria, lanthanum oxide, magnesium aluminate spinel, magnesium oxide and combinations thereof.
    Type: Application
    Filed: January 30, 2012
    Publication date: August 1, 2013
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: William Erwin COHEN, William BEERS, Alok SRIVASTAVA, Laszlo BALAZS, Istvan DEME
  • Patent number: 8468174
    Abstract: User interactions with a database storage system allow creation of virtual databases based on point-in-time copies associated with a source database. Multiple point-in-time copies are obtained for each source database. A point-in-time copy retrieves data changed in the source database since the retrieval of a previous point-in-time copy. A virtual database (VDB) is created by creating a set of files in the data storage system and mounting the files on a database server allowing the database server to access the files. User interactions allow the user to specify the source database, a point in time associated with the source database and a destination server to create the virtual database. User input can specify other attributes associated with the virtual database including the file paths, database parameters etc. The user can specify schedules of various actions, including making and retention of point-in-time copies.
    Type: Grant
    Filed: November 21, 2011
    Date of Patent: June 18, 2013
    Inventors: Jedidiah Yueh, Xavier David Luiz, Yan Wang, Alok Srivastava
  • Patent number: 8417478
    Abstract: There is disclosed a system and method for network test conflict checking. The method may be performed by a network testing system and may be implemented as software. The method may include receiving user selected test features and user selected hardware for a network test. When receiving user selected features, incompatible features are made unselectable by reference to a feature database. A compatibility check is performed by referring to a hardware database and a feature database. Suggestive corrective changes may be provided to a user or automatically made to the selected features and/or selected hardware. The network test is written to hardware when the compatibility test is successful.
    Type: Grant
    Filed: September 23, 2010
    Date of Patent: April 9, 2013
    Assignee: Ixia
    Inventors: Noah Gintis, Alok Srivastava, Victor Alston
  • Patent number: 8404153
    Abstract: This disclosure features a blend, or use together in at least two layers of an article of manufacture, of a first persistent phosphor, a second persistent phosphor and a third phosphor. The first persistent phosphor has a formula I: Cax-y-z-aAaAl2-m-n-o-pOd:Euy,REz,Bm,Znn,Coo,Scp??I where the variables are defined in the disclosure. The second persistent phosphor has a formula II: Srx-y-z-aAaAl14-m-n-o-pOd:Euy,REz,Bm,Znn,Coo,Scp??II where the variables are defined in the disclosure. The third phosphor is a non-persistent phosphor that is excited at a wavelength in a range of 300-500 nm. Also featured is an article of manufacture including the blend or the phosphors present in at least two layers. Once the blend or layered structure comprising the three phosphors has been excited it can appear white in an absence of ambient light.
    Type: Grant
    Filed: December 17, 2010
    Date of Patent: March 26, 2013
    Assignee: General Electric Company
    Inventors: Holly Ann Comanzo, Alok Srivastava, William W. Beers
  • Patent number: 8332386
    Abstract: Techniques and systems are provided for capturing relationships between items in “bonds”, and using the bonds to facilitate searches against the items. It is described how bonds that reflect relationships between searchable items are stored. The degree of separation between any two given searchable items is based on the minimum number of bonds that have to be traversed to arrive at one of the two searchable items when starting at the other of the two searchable items. The bonds are used to respond to a search request, performing a search relative to a designated searchable item. For example, the search mechanism may search only those searchable items that are within a particular degree of separation of the designated searchable item. As another example, the search mechanism may determine the order in which searchable items are compared against search criteria of the search request based on the degree of separation of the searchable items from the designated searchable item.
    Type: Grant
    Filed: March 29, 2006
    Date of Patent: December 11, 2012
    Assignee: Oracle International Corporation
    Inventors: Terry M. Olkin, Alok Srivastava
  • Publication number: 20120215807
    Abstract: A method and a device for representing digital documents for search applications are provided. The method includes periodically obtaining one or more digital documents stored in a memory of a handheld device, and generating a compressed representation of the one or more digital documents stored in the memory using one or more balanced trees. Additionally, the method includes receiving a search query including one or more words from a user of the handheld device for searching for one or more digital documents, and retrieving the one or more digital documents including the one or more words by traversing through a digital document map table and providing a search result including the one or more retrieved digital documents on the display of the handheld device if it is determined that the one or more words correspond to the one or more nodes in the word balanced tree.
    Type: Application
    Filed: February 23, 2012
    Publication date: August 23, 2012
    Applicant: SAMSUNG ELECTRONICS CO. LTD.
    Inventors: Alok SRIVASTAVA, M N S BHARADWAJ, Shatrughan SINGH, Tarun PANGTI
  • Publication number: 20120153227
    Abstract: This disclosure features a persistent phosphor having the following formula I: Sra,Cab,BacAl2-m-n-o-pOd:Euy,REz,Bm,Znn,Coo,Scp??I where a and b each range from about 0.3 to about 0.7; c is between about 0 and about 0.1; 0.75?a+b+c+y+z?1.3; y is between about 0.0005 and about 0.1; RE is any rare earth element alone or in combination; z is between about 0.0005 and about 0.15; m is between about 0.0005 and about 0.30; n is between about 0 and about 0.10; o is between about 0 and about 0.01; p is between about 0 and about 0.10 and d ranges from about 3.945 to about 4.075. Once the persistent phosphor has been excited it appears white in an absence of ambient light. Also featured is an article of manufacture that includes the phosphor.
    Type: Application
    Filed: December 17, 2010
    Publication date: June 21, 2012
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Alok SRIVASTAVA, Holly Ann Comanzo, Sam Camardello, William W. Beers
  • Publication number: 20120153226
    Abstract: This disclosure features a blend, or use together in at least two layers of an article of manufacture, of a first persistent phosphor, a second persistent phosphor and a third phosphor. The first persistent phosphor has a formula I: Cax-y-z-aAaAl2-m-n-o-pOd:Euy,REz,Bm,Znn,Coo,Scp??I where the variables are defined in the disclosure. The second persistent phosphor has a formula II: Srx-y-z-aAaAl14-m-n-o-pOd:Euy,REz,Bm,Znn,Coo,Scp??II where the variables are defined in the disclosure. The third phosphor is a non-persistent phosphor that is excited at a wavelength in a range of 300-500 nm. Also featured is an article of manufacture including the blend or the phosphors present in at least two layers. Once the blend or layered structure comprising the three phosphors has been excited it can appear white in an absence of ambient light.
    Type: Application
    Filed: December 17, 2010
    Publication date: June 21, 2012
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Holly Ann COMANZO, Alok Srivastava, William W. Beers
  • Publication number: 20120149888
    Abstract: The present invention relates to synthesis, purification and methods to obtain high purity novel 2?-arabino-O-methyl nucleosides and the corresponding phosphoramidites of various arabinonucleoside bases and introduction of such units into defined sequence synthetic DNA and RNA. Various synthetic oligonucleotides, such as HIV integrase inhibitor 14-mer and thrombin binding oligonucleotide, thrombin-1, bearing ara-2?-omethyl modification have been synthesized. It is anticipated the oligonucleotides incorporating these monomers will exhibit biological activities related to antisense approach approach, design of better SiRNA's, diagnostic agents. Similarly, it is anticipated that oligonucleotides incorporating such novel nucleosides will be useful to develop therapeutic candidates designing stable G-quadruplexes and Aptamers for oligonucleotide structure, folding topology, evaluation of biochemical properties and design and develop as therapeutic agents.
    Type: Application
    Filed: February 23, 2010
    Publication date: June 14, 2012
    Inventors: Suresh C. Srivastava, Divya Pandey, Naveen P. Srivastava, Alok Srivastava
  • Patent number: 8169856
    Abstract: Techniques are described herein for synchronizing cluster time. According to one technique, a master node is appointed in a cluster. Other “slave” nodes periodically synchronize their clocks with the master node. To synchronize its clock with the master node, a slave node sends a timestamped message to the master node, which also timestamps the message and sends the message back to the slave node, which then timestamps the message again. Based on the timestamps, the slave node is able to determine the difference between the master node's clock's time and slave node's clock's time, compensating for the message travel time between master node and slave node. Depending on various circumstances, and based on the determined difference, the slave node adjusts its clock so that the time indicated by the slave node's clock at least begins to approach more closely the time indicated by the master node's clock.
    Type: Grant
    Filed: October 24, 2008
    Date of Patent: May 1, 2012
    Assignee: Oracle International Corporation
    Inventors: Vikram Rai, Alok Srivastava, Angelo Pruscino, Sameer Joshi
  • Publication number: 20120078566
    Abstract: There is disclosed a system and method for network test conflict checking. The method may be performed by a network testing system and may be implemented as software. The method may include receiving user selected test features and user selected hardware for a network test. When receiving user selected features, incompatible features are made unselectable by reference to a feature database. A compatibility check is performed by referring to a hardware database and a feature database. Suggestive corrective changes may be provided to a user or automatically made to the selected features and/or selected hardware. The network test is written to hardware when the compatibility test is successful.
    Type: Application
    Filed: September 23, 2010
    Publication date: March 29, 2012
    Inventors: Noah Gintis, Alok Srivastava, Victor Alston
  • Patent number: 8083930
    Abstract: A process is described for producing deasphalted steam cracker tar comprising feeding steam cracker tar to a vacuum pipestill (VPS) including a flash zone separated from a zone comprising trays by at least one annular entrainment ring and obtaining as an overheads a deasphalted tar product and as a bottoms an asphaltenic heavy tar product. Also according to the invention, there is a system for the upgrading of tar comprising said VPS with at least one annular entrainment ring.
    Type: Grant
    Filed: July 25, 2007
    Date of Patent: December 27, 2011
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: James N. McCoy, Paul F. Keusenkothen, Alok Srivastava, James E Graham
  • Patent number: 8083931
    Abstract: The invention is directed to a process wherein a feedstock or stream comprising steam cracker tar is passed to a vacuum pipestill. A deasphalted cut of tar is obtained as an overhead (or sidestream) and a heavy tar asphaltenic product is obtained as bottoms. In preferred embodiments, at least a portion of the bottoms product is sent to a partial oxidation unit (POX) wherein syn gas may be obtained as a product, and/or at least a portion of the bottoms product is used to produce a light product stream in a coker unit, such as coker naphtha and/or or coker gas oil. In another preferred embodiment at least a portion of the overheads product is added to refinery fuel oil pools and in yet another preferred embodiment at least a portion of the overheads product is mixed with locally combusted materials to lower soot make. Two or more of the aforementioned preferred embodiments may be combined.
    Type: Grant
    Filed: July 25, 2007
    Date of Patent: December 27, 2011
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: James N. McCoy, Paul F. Keusenkothen, Alok Srivastava, James E Graham
  • Patent number: 7990040
    Abstract: A fluorescent lamp including a phosphor layer including (Y1-x-yGdx)AlO3:EU3+y, wherein 0.4?x?0.7 and 0?y?0.1, and at least one of each of a green and blue emitting phosphor. The resulting lamp will exhibit a white light having a color rendering index of preferably 90 or higher with a correlated color temperature of from 2500 to 10000 Kelvin. The use of (Y1-x-yGdx)AlO3:Eu3+y in phosphor blends of lamps results in high CRI light sources with increased stability and acceptable lumen maintenance over, the course of the lamp life.
    Type: Grant
    Filed: June 11, 2008
    Date of Patent: August 2, 2011
    Assignee: General Electric Company
    Inventors: Alok Srivastava, Holly Comanzo, Venkatesan Manivannan
  • Patent number: 7906010
    Abstract: The invention relates to the use of steam cracked tar with the bottoms product of a flash drum integrated with a pyrolysis furnace. In embodiments, the steam cracked tar is added to fuel oil.
    Type: Grant
    Filed: January 13, 2006
    Date of Patent: March 15, 2011
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Paul F. Keusenkothen, Alok Srivastava
  • Publication number: 20110024685
    Abstract: Crystalline scintillator materials comprising nano-scale particles of metal oxides, metal oxyhalides and metal oxysulfides are provided. The nano-scale particles are less than 100 nm in size. Methods are provided for preparing the particles. In one method, used to form oxyhalides and oxysulfides, metal salts are dissolved in water, and then precipitated out as fine particles using an aqueous base. After the particles are separated from the solution, they are annealed under a flow of a water saturated hydrogen anion gas, such as HCl or H2S, to form the crystalline scintillator particles The other methods take advantage of the characteristics of microemulsion solutions to control droplet size, and, thus, the particle size of the final nano-particles. For example, in one method, a first micro-emulsion containing metal salts if formed. The first micro-emulsion is mixed with an aqueous base in a second micro-emulsion to form the final nano-scale particles.
    Type: Application
    Filed: January 21, 2010
    Publication date: February 3, 2011
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Brent Allen Clothier, Sergio Paulo Martins Loureiro, Alok Srivastava, Stanley John Stoklosa, Steven Jude Duclos, Venkat Subramaniam Venkataramani
  • Patent number: 7846324
    Abstract: The invention relates to a process for upgrading tar using a heat exchanger in series with a vapor/liquid separator to separate tar into a heavy tar asphaltenic material and a deasphalted tar material.
    Type: Grant
    Filed: January 31, 2008
    Date of Patent: December 7, 2010
    Assignee: Exxonmobil Chemical Patents Inc.
    Inventors: Subramanian Annamalai, Paul F. Keusenkothen, Alok Srivastava, James N. McCoy
  • Publication number: 20100299447
    Abstract: A method, system and computer program product for managing data replication for data groups stored in a first storage device. A polling interval, a maximum bandwidth and a bandwidth tolerance available for data replication is defined. A priority and a status for each data group is defined. The data replication is started in the polling interval, for the data group with highest priority in the pending status to a second storage device connected to the first storage. The rate of data transfer during a polling period is determined by dividing the total data transferred during the polling interval by time period of the polling interval; and bandwidth utilization is determined for data replication by comparing rate of data transfer with maximum bandwidth. If the bandwidth utilization is less than the maximum bandwidth available then another data group is selected for replication. If the data bandwidth utilization is more than the maximum bandwidth available then selected data groups replicating are paused.
    Type: Application
    Filed: July 11, 2009
    Publication date: November 25, 2010
    Inventors: Nilesh Anant Salvi, Alok Srivastava, Eranna Talur
  • Patent number: 7814360
    Abstract: Synchronizing cluster time is described. Times of one or more nodes in the cluster to a master node of the cluster are synchronized. It is discovered that a node of a cluster has a clock time that is ahead of a master clock time of the master node. In response to discovering the node with the clock time ahead of the master clock time, the master node is replaced with the node ahead thereof in time, which thus becomes a new master node. The clock times of the cluster nodes are synchronized with the clock time of the new master node.
    Type: Grant
    Filed: January 25, 2007
    Date of Patent: October 12, 2010
    Assignee: Oralce International Corporation
    Inventors: Vikram Rai, Alok Srivastava