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).
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Patent number: 8506843Abstract: 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: GrantFiled: December 17, 2010Date of Patent: August 13, 2013Assignee: General Electric CompanyInventors: Alok Srivastava, Holly Ann Comanzo, Sam Camardello, William W. Beers
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Publication number: 20130193835Abstract: 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: ApplicationFiled: January 30, 2012Publication date: August 1, 2013Applicant: GENERAL ELECTRIC COMPANYInventors: William Erwin COHEN, William BEERS, Alok SRIVASTAVA, Laszlo BALAZS, Istvan DEME
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Patent number: 8468174Abstract: 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: GrantFiled: November 21, 2011Date of Patent: June 18, 2013Inventors: Jedidiah Yueh, Xavier David Luiz, Yan Wang, Alok Srivastava
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Patent number: 8417478Abstract: 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: GrantFiled: September 23, 2010Date of Patent: April 9, 2013Assignee: IxiaInventors: Noah Gintis, Alok Srivastava, Victor Alston
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Patent number: 8404153Abstract: 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: GrantFiled: December 17, 2010Date of Patent: March 26, 2013Assignee: General Electric CompanyInventors: Holly Ann Comanzo, Alok Srivastava, William W. Beers
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Patent number: 8332386Abstract: 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: GrantFiled: March 29, 2006Date of Patent: December 11, 2012Assignee: Oracle International CorporationInventors: Terry M. Olkin, Alok Srivastava
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Publication number: 20120215807Abstract: 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: ApplicationFiled: February 23, 2012Publication date: August 23, 2012Applicant: SAMSUNG ELECTRONICS CO. LTD.Inventors: Alok SRIVASTAVA, M N S BHARADWAJ, Shatrughan SINGH, Tarun PANGTI
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Publication number: 20120153227Abstract: 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: ApplicationFiled: December 17, 2010Publication date: June 21, 2012Applicant: GENERAL ELECTRIC COMPANYInventors: Alok SRIVASTAVA, Holly Ann Comanzo, Sam Camardello, William W. Beers
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Publication number: 20120153226Abstract: 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: ApplicationFiled: December 17, 2010Publication date: June 21, 2012Applicant: GENERAL ELECTRIC COMPANYInventors: Holly Ann COMANZO, Alok Srivastava, William W. Beers
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Publication number: 20120149888Abstract: 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: ApplicationFiled: February 23, 2010Publication date: June 14, 2012Inventors: Suresh C. Srivastava, Divya Pandey, Naveen P. Srivastava, Alok Srivastava
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Patent number: 8169856Abstract: 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: GrantFiled: October 24, 2008Date of Patent: May 1, 2012Assignee: Oracle International CorporationInventors: Vikram Rai, Alok Srivastava, Angelo Pruscino, Sameer Joshi
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Publication number: 20120078566Abstract: 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: ApplicationFiled: September 23, 2010Publication date: March 29, 2012Inventors: Noah Gintis, Alok Srivastava, Victor Alston
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Patent number: 8083930Abstract: 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: GrantFiled: July 25, 2007Date of Patent: December 27, 2011Assignee: ExxonMobil Chemical Patents Inc.Inventors: James N. McCoy, Paul F. Keusenkothen, Alok Srivastava, James E Graham
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Patent number: 8083931Abstract: 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: GrantFiled: July 25, 2007Date of Patent: December 27, 2011Assignee: ExxonMobil Chemical Patents Inc.Inventors: James N. McCoy, Paul F. Keusenkothen, Alok Srivastava, James E Graham
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Patent number: 7990040Abstract: 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: GrantFiled: June 11, 2008Date of Patent: August 2, 2011Assignee: General Electric CompanyInventors: Alok Srivastava, Holly Comanzo, Venkatesan Manivannan
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Patent number: 7906010Abstract: 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: GrantFiled: January 13, 2006Date of Patent: March 15, 2011Assignee: ExxonMobil Chemical Patents Inc.Inventors: Paul F. Keusenkothen, Alok Srivastava
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Publication number: 20110024685Abstract: 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: ApplicationFiled: January 21, 2010Publication date: February 3, 2011Applicant: GENERAL ELECTRIC COMPANYInventors: Brent Allen Clothier, Sergio Paulo Martins Loureiro, Alok Srivastava, Stanley John Stoklosa, Steven Jude Duclos, Venkat Subramaniam Venkataramani
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Patent number: 7846324Abstract: 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: GrantFiled: January 31, 2008Date of Patent: December 7, 2010Assignee: Exxonmobil Chemical Patents Inc.Inventors: Subramanian Annamalai, Paul F. Keusenkothen, Alok Srivastava, James N. McCoy
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Publication number: 20100299447Abstract: 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: ApplicationFiled: July 11, 2009Publication date: November 25, 2010Inventors: Nilesh Anant Salvi, Alok Srivastava, Eranna Talur
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Patent number: 7814360Abstract: 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: GrantFiled: January 25, 2007Date of Patent: October 12, 2010Assignee: Oralce International CorporationInventors: Vikram Rai, Alok Srivastava