Patents by Inventor Srinivas Laxminarayan Pathi

Srinivas Laxminarayan Pathi 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).

  • Publication number: 20240059661
    Abstract: The present disclosure relates to novel solid state forms of Tafamidis of Formula (I), and process for preparation thereof. The invention is also directed to pharmaceutical compositions containing at least one solid form and to the therapeutic or prophylactic use of such solid forms and compositions. Such compositions may be used for the treatment of transthyretin-related hereditary amyloidosis, neurodegenerative diseases, amyloidosis, neuropathic pain, amyloid fibril formation and cardiomyopathy related diseases.
    Type: Application
    Filed: February 25, 2022
    Publication date: February 22, 2024
    Inventors: Arijit DAS, Srinivas Laxminarayan PATHI, Ramanaiah CHENNURA, Anjaneya INDUKARI, Prathap RENGARAJ
  • Publication number: 20230212115
    Abstract: The present invention relates to process for preparation of 1-(4-{1-[(E)-4-cyclohexyl-3-trifluoromethyl-benzyloxy imino]ethyl}-2-ethyl-benzyl)-azetidine-3-carboxylic acid, intermediates, salts and solid forms thereof to pharmaceutical compositions comprising the salts and solid forms and to use of said compositions for the treatment of multiple sclerosis, particularly secondary progressive multiple sclerosis.
    Type: Application
    Filed: May 27, 2021
    Publication date: July 6, 2023
    Inventors: Srinivas Laxminarayan Pathi, Puppala Ravi Kumar, Ramanaiah Chennuru, Durga Surya Narayana YARRA, Yellanki Jagannadham, Siva Krishna Nangedda, Lakkireddy Pullareddy, Raju Barla
  • Publication number: 20230075170
    Abstract: The present invention relates to the solid forms of Nilotinib D-Malate and Nilotinib D-Tartrate, processes for preparation thereof, pharmaceutical compositions thereof, and methods of use thereof.
    Type: Application
    Filed: February 15, 2021
    Publication date: March 9, 2023
    Inventors: Srinivas Laxminarayan PATHI, Ramanaiah CHENNURU, Ravikumar PUPPALA, Raju BARLA, Krishna RAGHAVENDRA
  • Publication number: 20220144851
    Abstract: Novel crystalline forms of Bictegravir sodium, pharmaceutical compositions containing said crystalline forms and the use of said crystalline forms in the treatment of HIV infection are disclosed. The present invention is further directed to the processes for the preparation of the novel crystalline forms.
    Type: Application
    Filed: February 6, 2020
    Publication date: May 12, 2022
    Inventors: Venkata Srinivas PULLELA, Srinivas Laxminarayan PATHI, Ramanaiah CHENNURU, Manjinder Singh PHULL, Anjaneyaraju INDUKARI
  • Publication number: 20220009929
    Abstract: Disclosed herein are crystalline polymorphic forms of Ibrutinib, methods for their preparation, pharmaceutical compositions comprising the polymorphic Forms, and their use thereof.
    Type: Application
    Filed: May 2, 2019
    Publication date: January 13, 2022
    Inventors: Ramanaiah CHENNURU, Srinivas Laxminarayan PATHI, Geena MALHOTRA, Ramesh DEVARAPALLI
  • Publication number: 20220002302
    Abstract: The present invention discloses novel crystalline polymorphic forms of Acalabrutinib, methods of preparation, pharmaceutical compositions and methods of therapeutic treatment involving polymorphic forms thereof.
    Type: Application
    Filed: September 24, 2019
    Publication date: January 6, 2022
    Inventors: Geena MALHOTRA, Venkata Srinivas PULLELA, Srinivas Laxminarayan PATHI, Ramanaiah CHENNURU, Ramesh DEVARAPALLI, Ashok MITHUN
  • Publication number: 20200407382
    Abstract: The present invention discloses novel crystalline polymorphic forms of (9-[(R)-2-[[(S)-[[(S)-1-(isopropoxy carbonyl) ethyl] amino] phenoxyphosphinyl] methoxy]propyl] adenine hemifumarate and 9-[(R)-2-[[(S)-[[(S)-1-(isopropoxycarbonyl)ethyl] amino]phenoxy phosphinyl]methoxy]propyl] adenine monofumarate, methods of preparation, pharmaceutical compositions and methods of therapeutic treatment involving polymorphic forms thereof.
    Type: Application
    Filed: December 28, 2018
    Publication date: December 31, 2020
    Inventors: Dharmaraj Ramachandra RAO, Geena MALHOTRA, Srinivas Laxminarayan PATHI, Manjinder Singh PHULL, Ramanaiah CHENNURU
  • Publication number: 20190270735
    Abstract: The present invention provides novel polymorphic forms of dasatinib compound of the formula 1 as well as the process for the preparation thereof.
    Type: Application
    Filed: October 30, 2017
    Publication date: September 5, 2019
    Inventors: Dharmaraj Ramachandra RAO, Geena MALHOTRA, Srinivas Laxminarayan PATHI, Ravikumar PUPPALA, Yellanki JAGANNADHAM, Ramanaiah CHENNURU
  • Patent number: 10301282
    Abstract: The present invention relates to a novel polymorph of nilotinib hydrochloride (Form X), to processes for its preparation, to pharmaceutical compositions containing the same and to its use in medicine.
    Type: Grant
    Filed: March 21, 2016
    Date of Patent: May 28, 2019
    Assignee: Cipla Limited
    Inventors: Dharmaraj Ramachandra Rao, Geena Malhotra, Srinivas Laxminarayan Pathi, Venugopalarao Chinimilli, Manish Gopaldas Gangrade
  • Patent number: 10287248
    Abstract: The present invention relates to novel processes for the preparation of apremilast of formula I, or a pharmaceutically acceptable salt thereof.
    Type: Grant
    Filed: March 15, 2016
    Date of Patent: May 14, 2019
    Assignee: CIPLA LIMITED
    Inventors: Dharmaraj Ramachandra Rao, Geena Malhotra, Srinivas Laxminarayan Pathi, Ravikumar Puppala, Suryanarayana Durga Yarra
  • Publication number: 20180237390
    Abstract: The present invention relates to novel processes for the preparation of apremilast of formula I, or a pharmaceutically acceptable salt thereof.
    Type: Application
    Filed: March 15, 2016
    Publication date: August 23, 2018
    Inventors: Dharmaraj Ramachandra RAO, Geena MALHOTRA, Srinivas Laxminarayan PATHI, Ravikumar PUPPALA, Suryanarayana Durga YARRA
  • Patent number: 10023611
    Abstract: A novel and improved process for preparation of bortezomib mannitol ester is derived, which process avoids excessive use of solvents, involves convenient, industrially feasible and economical techniques, and provides improvements in purity over processes known in the art.
    Type: Grant
    Filed: April 16, 2014
    Date of Patent: July 17, 2018
    Assignee: Cipla Limited
    Inventors: Ravikumar Puppala, Srinivas Laxminarayan Pathi, Dharmaraj Ramachandra Rao, Rajendra Narayanrao Kankan
  • Publication number: 20180111915
    Abstract: The present invention relates to a novel polymorph of nilotinib hydrochloride (Form X), to processes for its preparation, to pharmaceutical compositions containing the same and to its use in medicine.
    Type: Application
    Filed: March 21, 2016
    Publication date: April 26, 2018
    Applicant: Cipla Limited
    Inventors: Dharmaraj Ramachandra RAO, Geena MALHOTRA, Srinivas Laxminarayan PATHI, Venugopalarao CHINIMILLI, Manish Gopaldas GANGRADE
  • Patent number: 9890121
    Abstract: The present invention relates to a process for the preparation of Compound (A): wherein the process comprises contacting atazanavir base (Compound (II)) with sulphuric acid in a combination of two or more solvents and isolating compound (A). The present invention also relates to substantially pure Compound (A), and to Compound (A) devoid of mesityl oxide impurity.
    Type: Grant
    Filed: February 12, 2014
    Date of Patent: February 13, 2018
    Assignee: Cipla Limited
    Inventors: Rajendra Narayanrao Kankan, Srinivas Laxminarayan Pathi, Venugopalarao Chinimilli
  • Patent number: 9505787
    Abstract: The present invention provides improved processes for the preparation of Bortezomib, tert -butyl[1-({(1S)-3-methyl-1-[(3aS,4S,6S,7aS)-3a,5,5-trimethylhexahydro-4,6-methano-1,3,2-benzodioxaborol-2-yl]butyl}amino)-1-oxo-3-phenylpropan-2-yl]carbamate of formula (IV) and N-{(1S)-3-methyl-1-[(3aS,4S,6S,7aS)-3a,5,5-trimethylhexahydro-4,6-methano-1,3,2-benzodioxaborol-2-yl]butyl} phenylalanine of formula (V). Compound (IV) is prepared by coupling (1R)-3-methyl-1-[(3aS,4S,6S,7aR)-3a,5,5-trimethyl-hexahydro-4,6-methano-1,3,2-benzodioxaborol-2-yl]butan-1-amine of formula (II) or its salt with N-(tert-butoxycarbonyl)-L -phenylalanine of formula (III) in a first solvent in the presence of a first coupling agent and a first base, wherein the coupling process does not comprise solvent exchange. Compound (V) is prepared by deprotecting compound (IV) using an alcoholic solution of an inorganic acid.
    Type: Grant
    Filed: September 11, 2013
    Date of Patent: November 29, 2016
    Assignee: Cipla Limited
    Inventors: Dharmaraj Ramachandra Rao, Rajendra Narayanrao Kankan, Srinivas Laxminarayan Pathi, Ravikumar Puppala
  • Publication number: 20160075736
    Abstract: A novel and improved process for preparation of bortezomib mannitol ester is derived, which process avoids excessive use of solvents, involves convenient, industrially feasible and economical techniques, and provides improvements in purity over processes known in the art.
    Type: Application
    Filed: April 16, 2014
    Publication date: March 17, 2016
    Inventors: Ravikumar PUPPALA, Srinivas Laxminarayan PATHI, Dharmaraj Ramachandra RAO, Rajendra Narayanrao KANKAN
  • Publication number: 20160002166
    Abstract: The present invention relates to a process for the preparation of Compound (A): wherein the process comprises contacting atazanavir base (Compound (II)) with sulphuric acid in a combination of two or more solvents and isolating compound (A). The present invention also relates to substantially pure Compound (A), and to Compound (A) devoid of mesityl oxide impurity.
    Type: Application
    Filed: February 12, 2014
    Publication date: January 7, 2016
    Inventors: Rajendra Narayanrao KANKAN, Srinivas Laxminarayan PATHI, Venugopalarao CHINIMILLI
  • Publication number: 20150359898
    Abstract: A complex comprises pemetrexed and a coformer. A pharmaceutical composition comprises a complex of pemetrexed and a co-former and one or more pharmaceutically acceptable excipients.
    Type: Application
    Filed: February 6, 2014
    Publication date: December 17, 2015
    Applicant: CIPLA LIMITED
    Inventors: Shrinivas Madhukar Purandare, Geena Malhotra, Dharmaraj Ramachandra Rao, Rajendra Narayanrao Kankan, Srinivas Laxminarayan Pathi, Ravikumar Puppla
  • Publication number: 20150246935
    Abstract: The present invention provides improved processes for the preparation of Bortezomib, tert-butyl[1-({(1S)-3-methyl-1-[(3aS,4S,6S,7aS)-3a,5,5-trimethylhexahydro-4,6-methano-1,3,2-benzodioxaborol-2-yl]butyl}amino)-1-oxo-3-phenylpropan-2-yl]carbamate of formula (IV) and N-{(1S)-3-methyl-1-[(3aS,4S,6S,7aS)-3a,5,5-trimethylhexahydro-4,6-methano-1,3,2-benzodioxaborol-2-yl]butyl} phenylalanine of formula (V). Compound (IV) is prepared by coupling (1R)-3-methyl-1-[(3aS,4S,6S,7aR)-3a,5,5-trimethyl-hexahydro-4,6-methano-1,3,2-benzodioxaborol-2-yl]butan-1-amine of formula (II) or its salt with N-(tert-butoxycarbonyl)-L-phenylalanine of formula (III) in a first solvent in the presence of a first coupling agent and a first base, wherein the coupling process does not comprise solvent exchange. Compound (V) is prepared by deprotecting compound (IV) using an alcoholic solution of an inorganic acid.
    Type: Application
    Filed: September 11, 2013
    Publication date: September 3, 2015
    Inventors: Dharmaraj Ramachandra Rao, Rajendra Narayanrao Kankan, Srinivas Laxminarayan Pathi, Ravikumar Puppala
  • Patent number: 9062049
    Abstract: The present invention provides a process for the preparation of paliperidone or a pharmaceutically acceptable salt thereof, wherein the process comprises condensing a compound of formula (II) with a compound of formula (III) or a salt thereof, in a suitable solvent and a base, in the presence of a catalyst and an inhibiting agent, wherein the inhibiting agent is added to the reaction system before the compound of formula (II) and compound of formula (III) have reacted or as the reaction of the compound of formula (II) and compound of formula (III) is initiated, and optionally converting the paliperidone to a salt thereof, wherein X is a suitable leaving group. The present invention also provides substantially pure paliperidone or a salt thereof, paliperidone or a salt thereof as prepared by the process and uses of the paliperidone or salt thereof.
    Type: Grant
    Filed: May 30, 2012
    Date of Patent: June 23, 2015
    Assignee: Cipla Limited
    Inventors: Ravikumar Puppala, Srinivas Laxminarayan Pathi, Rajendra Narayanrao Kankan