Patents by Inventor Prasad Vellanki

Prasad Vellanki 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: 10730888
    Abstract: Processes for the preparation of dolutegravir and pharmaceutically acceptable salts utilizing alkenylamine are disclosed. Intermediates in those synthetic schemes are also disclosed.
    Type: Grant
    Filed: February 5, 2016
    Date of Patent: August 4, 2020
    Assignee: Mylan Laboratories Limited
    Inventors: Sivaram Prasad Vellanki, Madumurthy Nadella, Mitali Bhalme, Revathi Srinivas Ramabhotla, Venkata Siva Reddy Arumalla, Raveendra Babu Kilaru
  • Patent number: 10391178
    Abstract: The present disclosure provides a process for the preparation a premix of raltegravir potassium form 3 with excipients. This premix may be used in the manufacture of pharmaceutical formulations containing raltegravir.
    Type: Grant
    Filed: March 20, 2015
    Date of Patent: August 27, 2019
    Assignee: Mylan Laboratories Limited
    Inventors: Ramesh Dandala, Sivarama Prasad Vellanki, Raja Babu Balusu, Subbarayudu Putta
  • Publication number: 20180244693
    Abstract: Processes for the preparation of dolutegravir and pharmaceutically acceptable salts utilizing alkenylamine are disclosed. Intermediates in those synthetic schemes are also disclosed.
    Type: Application
    Filed: February 5, 2016
    Publication date: August 30, 2018
    Applicant: Mylan Laboratories Ltd.
    Inventors: Sivaram Prasad VELLANKI, Madumurthy NADELLA, Mitali BHALME, Revathi Srinivas RAMABHOTLA, Venkata Siva Reddy ARUMALLA, Raveendra Babu KILARU
  • Publication number: 20180169245
    Abstract: The present disclosure provides a process for the preparation a premix of raltegravir potassium form 3 with excipients. This premix may be used in the manufacture of pharmaceutical formulations containing raltegravir.
    Type: Application
    Filed: March 20, 2015
    Publication date: June 21, 2018
    Inventors: Ramesh DANDALA, Sivarama Prasad VELLANKI, Raja Babu BALUSU, Subbarayudu PUTTA
  • Publication number: 20170253585
    Abstract: The present disclosure provides a process for the preparation of 2-(2-amino propan-2-yl)-N-(4-fluorobenzyl)-5-hydroxy-1-methyl-6-oxo-1,6-dihydro-pyrimidine-4-carboxamide by debenzylation of benzyl(2-{4-[(4-fluorobenzyl)carbamoyl]-5-hydroxy-1-methyl-6-oxo-1,6-dihydropyrimidin-2-yl}propan-2-yl)carbamate. This process may be used in the synthesis of raltegravir and pharmaceutically acceptable salts thereof.
    Type: Application
    Filed: February 3, 2015
    Publication date: September 7, 2017
    Inventors: Siva Ram Prasad Vellanki, Raja Babu Balusu, Kiran Mitchanagatla
  • Publication number: 20170247359
    Abstract: A process for the preparation of canagliflozin. The process may be effectively implemented on an industrial scale. Several compounds useful as intermediates for the synthesis of canagliflozin (Formula 4, Formula 4a, Formula 4b and Formula 5) are also disclosed. The process involves the reduction of the compound of formula 3 in the presence of a metal hydride and an organic solvent to obtain the compound of formula 4, converting this into a compound of formula 5 which in turn is converted into canagliflozin.
    Type: Application
    Filed: September 4, 2015
    Publication date: August 31, 2017
    Inventors: Siva Ram Prasad Vellanki, Raja Babu Balusu, Ramakrishna Pilli, Rajeswara Roa Jawaji, Ankama Nayudu Annadasu
  • Patent number: 9652182
    Abstract: Disclosed are a system, a method and/or an apparatus of a shareable virtual non-volatile storage device for a server. In one embodiment, the system includes a server, a storage array, a management processor, and a switching fabric. The storage array includes a storage device coupled with a controller associated with a shared driver to receive a data request from the server at a remote location from the storage array through the switch fabric via a communication link to direct the data request to the storage device coupled with it and transmit data to the server through the switch fabric. A virtual storage device is generated in the server to enable the server to share the shared driver in the storage array with other servers through the switch fabric between the server and the storage array. The server distributes the data across the storage devices through the shared driver.
    Type: Grant
    Filed: January 31, 2013
    Date of Patent: May 16, 2017
    Assignee: Pavilion Data Systems, Inc.
    Inventors: Kiron Balkrishna Malwankar, Srinivas Prasad Vellanki, Hemanth Srinivas Ravi
  • Patent number: 9216990
    Abstract: The present invention relates to a non-solvated crystalline Darunavir, process for its preparation and pharmaceutical composition comprising it. The present invention also relates to a process for the preparation of amorphous Darunavir from a non-solvated crystalline Darunavir.
    Type: Grant
    Filed: December 5, 2012
    Date of Patent: December 22, 2015
    Assignee: Mylan Labs Limited
    Inventors: Siva Rama Prasad Vellanki, Arabinda Sahu, Naveen Kumar Phadhuri, Ravindrababu Kilaru
  • Publication number: 20140350270
    Abstract: The present invention relates to a non-solvated crystalline Darunavir, process for its preparation and pharmaceutical composition comprising it. The present invention also relates to a process for the preparation of amorphous Darunavir from a non-solvated crystalline Darunavir.
    Type: Application
    Filed: December 5, 2012
    Publication date: November 27, 2014
    Applicant: Mylan Laboratores LTD
    Inventors: Siva Rama Prasad Vellanki, Arabinda Sahu, Naveen Kumar Phadhuri, Ravindrababu Kilaru
  • Patent number: 8759515
    Abstract: The present invention relates to an improved process for the preparation of Tenofovir Disoproxil and its pharmaceutically acceptable salts comprising the steps of: a) esterifying Tenofovir with chloromethyl isopropyl carbonate in presence of a base, phase transfer catalyst and optionally dehydrating agent, in a suitable solvent; b) optionally purifying Tenofovir Disoproxil; and c) converting of Tenofovir Disoproxil into its pharmaceutically acceptable salts. The present invention further relates to a process for the preparation of Tenofovir by reacting 1-(6-amino-purin-9-yl)-propan-2-ol with toluene-4-sulfonic acid diethoxy phosphoryl methyl ester in presence of a base in a non-polar solvent medium followed by hydrolysis.
    Type: Grant
    Filed: March 11, 2011
    Date of Patent: June 24, 2014
    Assignee: Mylan Laboratories Limited
    Inventors: Debashish Datta, Siva Rama Prasad Vellanki, Arabinda Sahu, Raja Babu Balusu, Mastan Rao Ravi, Hari Babu Nandipati, Shankar Rama, Lakshmana Rao Vadali, Srikanth Sarat Chandra Gorantla, Srinivasa Rao Dasari, Nagaraju Mittapelly
  • Patent number: 8703980
    Abstract: A process for the preparation of Darunavir comprises the reacting of 4-amino-N-(2R, 3S) (3-amino-2-hydroxy-4-phenylbutyl)-N-isobutyl-benzenesulfonamide with (3R, 3aS,6aR)-hexahydrofuro[2,3-b]furan-3-ol derivative in N-methyl-2-pyrrolidinone and isolating the resulting Darunavir. The process yields Darunavir with a very low level of the difuranyl impurity.
    Type: Grant
    Filed: September 16, 2010
    Date of Patent: April 22, 2014
    Inventors: Siva Rama Prasad Vellanki, Arabinda Sahu, Aravind Kumar Katukuri, Vikram Vanama, Satishbabu Kothari, Venkata Suryanarayana Ponnekanti, Debashish Datta
  • Publication number: 20130303780
    Abstract: The present invention relates an improved process for the preparation of 2-arylthiazole derivatives which are intermediates of Febuxostat and further conversion to Febuxostat or pharmaceutically acceptable salts thereof.
    Type: Application
    Filed: November 3, 2011
    Publication date: November 14, 2013
    Inventors: Siva Rama Prasad Vellanki, Arabinda Sahu, Satyanarayana Raavi, Ravi Nuchu, Ramesh Dandala
  • Publication number: 20130211108
    Abstract: The present invention relates to a novel process for the preparation of Fosamprenavir or its pharmaceutically acceptable salts thereof by using novel intermediates.
    Type: Application
    Filed: June 17, 2011
    Publication date: August 15, 2013
    Inventors: Siva Rama Prasad Vellanki, Madhu Murthy Nadella, Rajendra Reddy Mulamalla, Siva Koteswara Rao Prathi, Ravathi Srinivas Rambhotla, Siva Reddy Arumalla, Debashish Datta
  • Publication number: 20130198450
    Abstract: Disclosed are a system, a method and/or an apparatus of a shareable virtual non-volatile storage device for a server. In one embodiment, the system includes a server, a storage array, a management processor, and a switching fabric. The storage array includes a storage device coupled with a controller associated with a shared driver to receive a data request from the server at a remote location from the storage array through the switch fabric via a communication link to direct the data request to the storage device coupled with it and transmit data to the server through the switch fabric. A virtual storage device is generated in the server to enable the server to share the shared driver in the storage array with other servers through the switch fabric between the server and the storage array. The server distributes the data across the storage devices through the shared driver.
    Type: Application
    Filed: January 31, 2013
    Publication date: August 1, 2013
    Inventors: Kiron Balkrishna Malwankar, Srinivas Prasad Vellanki, Hemanth Srinivas Ravi
  • Publication number: 20130005969
    Abstract: The present invention relates to an improved process for the preparation of Tenofovir Disoproxil and its pharmaceutically acceptable salts comprising the steps of: a) esterifying Tenofovir with chloromethyl isopropyl carbonate in presence of a base, phase transfer catalyst and optionally dehydrating agent, in a suitable solvent; b) optionally purifying Tenofovir Disoproxil; and c) converting of Tenofovir Disoproxil into its pharmaceutically acceptable salts. The present invention further relates to a process for the preparation of Tenofovir by reacting 1-(6-amino-purin-9-yl)-propan-2-ol with toluene-4-sulfonic acid diethoxy phosphoryl methyl ester in presence of a base in a non-polar solvent medium followed by hydrolysis.
    Type: Application
    Filed: March 11, 2011
    Publication date: January 3, 2013
    Inventors: Debashish Datta, Siva Rama Prasad Vellanki, Arabinda Sahu, Raja Babu Balusu, Mastan Rao Ravi, Hari Babu Nandipati, Shankar Rama, Lakshmana Rao Vadali, Srikanth Sarat Chandra Gorantla, Srinivasa Rao Dasari, Nagaraju Mittapelly
  • Publication number: 20120251826
    Abstract: A process for the preparation of Darunavir comprises the reacting of 4-amino-N-(2R,3S) (3-amino-2-hydroxy-4-phenylbutyl)-N-isobutyl-benzenesulfonamide with (3R,3aS,6aR)-hexahydrofuro[2,3-b]furan-3-ol derivative in N-methyl-2-pyrrolidinone and isolating the resulting Darunavir. The process yields Darunavir with a very low level of the difuranyl impurity.
    Type: Application
    Filed: September 16, 2010
    Publication date: October 4, 2012
    Inventors: Siva Rama Prasad Vellanki, Arabinda Sahu, Aravind Kumar Katukuri, Vikram Vanama, Satishbabu Kothari, Venkata Suryanarayana Ponnekanti, Debashish Datta
  • Patent number: 8049009
    Abstract: The present invention relates to novel Tenofovir disoproxil hemifumarate salt, which is prepared by dealkylation of Phosphonate esters by using mineral acids followed by esterification and crystallization to give crystalline Tenofovir disoproxil. The Tenofovir disoproxil is further converted to fumarate salts with improved yield.
    Type: Grant
    Filed: January 12, 2009
    Date of Patent: November 1, 2011
    Assignee: Matrix Laboratories Ltd.
    Inventors: Uma Maheswer Rao Vasireddy, Siva Rama Prasad Vellanki, Raja Babu Balusu, Naga Durga Rao Bandi, Pavan Kumar Jujjavarapu, Sambasiva Rao Ginjupalli, Rama Krishna Pilli
  • Patent number: 7761585
    Abstract: A method in a computer network for automatically detecting a most advantageous protocol for communication by a client computer, said client computer being configured to be coupled to a server computer via a computer network. The method includes initiating a plurality of protocol threads for sending from the client computer to the server computer, a plurality of data requests. Each of the data requests employs a different protocol and a different connection. The data requests are configured to solicit, responsive to the data request, a set of responses from the server computer. Each of the responses employs a protocol associated with a respective one of the data requests. The method further includes receiving at the client computer at least a subset of the responses. The method also includes initiating a control thread at the client computer.
    Type: Grant
    Filed: October 6, 2005
    Date of Patent: July 20, 2010
    Assignee: Microsoft Corporation
    Inventors: Srinivas Prasad Vellanki, Anthony William Cannon, Hemanth Srinivas Ravi, Anders E. Klemets
  • Publication number: 20090286981
    Abstract: The present invention relates to novel Tenofovir disoproxil hemifumarate salt, which is prepared by dealkylation of Phosphonate esters by using mineral acids followed by esterification and crystallization to give crystalline Tenofovir disoproxil. The Tenofovir disoproxil is further converted to fumarate salts with improved yield.
    Type: Application
    Filed: January 12, 2009
    Publication date: November 19, 2009
    Inventors: Uma Maheswer Rao Vasireddy, Siva Rama Prasad Vellanki, Raja Babu Balusu, Naga Durga Rao Bandi, Pavan Kumar Jujjavarapu, Sambasiva Rao Ginjupalli, Rama Krishna Pilli
  • Patent number: 6230172
    Abstract: The production of synchronization scripts and associated annotated multimedia streams for servers and client computers coupled to each other by a diverse computer network which includes local area networks (LANs) and/or wide area networks (WANs) such as the intermet. Annotated multimedia streams can include a compressed video stream for display in a video window, an accompanying compressed audio stream and annotations. Synchronization scripts include annotation streams for synchronizing the display of video streams with annotations, e.g., displayable events, such textual/graphical data in the form of HTML pages with Java applets to be displayed in one or more event windows. The producer includes a capture module and an author module for capturing video streams and generating annotation streams, respectively. The capture module compresses the video stream using a suitable compression format.
    Type: Grant
    Filed: September 3, 1999
    Date of Patent: May 8, 2001
    Assignee: Microsoft Corporation
    Inventors: Audi Purnaveja, Navin Chaddha, Srinivas Prasad Vellanki, David del Val, Anoop Gupta, Edward Yan-bing Wang