Patents by Inventor Radhakrishna Bhikaji Shivdavkar

Radhakrishna Bhikaji Shivdavkar 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: 20230312485
    Abstract: A precipitation process for amorphous Letermovir, contains residual solvents in accordance with ICH guidelines and is suitable for the preparation of orally administered pharmaceutical formulations. The formulations of the amorphous Letermovir are intended for use in methods of prophylaxis or methods of treatment of viral diseases, in particular human cytomegalovirus (HCMV) infections.
    Type: Application
    Filed: August 7, 2021
    Publication date: October 5, 2023
    Inventors: Girij Pal Singh, Radhakrishna Bhikaji Shivdavkar, Govind Dnyanoba Ausekar, Mithun Dasharath Surwase, Rajendra Somnath Mhaske, Suhas Ganpat Tambe
  • Publication number: 20210300917
    Abstract: Various crystalline and amorphous solid state forms of an apoptosis-inducing agent and preparations thereof are disclosed. Also discloses the use of crystalline forms for the preparation of amorphous form of apoptosis-inducing agent. Further discloses a process for preparation of the apoptosis-inducing agent.
    Type: Application
    Filed: June 9, 2018
    Publication date: September 30, 2021
    Inventors: Lalitkumar Dilipsing Rajput, Vasant Chhabu Vyavhare, Radhakrishna Bhikaji Shivdavkar, Yuvraj Dadasaheb Sudrik, Rangan Mitra, Sangram Gokhale, Sunilkumar Vinubhai Gohel, Rajinder Singh Siyan, Nandu Baban Bhise, Girij Pal Singh
  • Patent number: 10752586
    Abstract: The present invention provides process for preparation of molindone (I) comprising: a) reacting compound with cyclohexane-1,3-dione to form 2-(2-oxopentan-3-yl)cyclohexane-1,3-dione wherein X is Cl, Br or I, b) cyclizing 2-(2-oxopentan-3-yl)cyclohexane-1,3-dione to 2-methyl-3-ethyl-4-oxo-4,5,6,7-tetrahydroindole, c) reacting 2-methyl-3-ethyl-4-oxo-4,5,6,7-tetrahydroindole with morpholine and formaldehyde to give molindone (I), and d) optionally converting molindone (I) to its salt. The present invention further provides process for preparation of compound comprising: a) reacting compound with ethyl halide and another halide source to form compound wherein R is alkyl and X is Cl, Br or I; b) converting compound to compound.
    Type: Grant
    Filed: February 14, 2020
    Date of Patent: August 25, 2020
    Assignee: LUPIN LIMITED
    Inventors: Amit Madanrao Agarkar, Tejas Vilas Puranik, Rajesh Bharat Gapat, Umesh Babanrao Rananaware, Radhakrishna Bhikaji Shivdavkar, Girij Pal Singh
  • Publication number: 20200262788
    Abstract: The present invention provides process for preparation of molindone (I) comprising: a) reacting compound with cyclohexane-1,3-dione to form 2-(2-oxopentan-3-yl)cyclohexane-1,3-dione wherein X is Cl, Br or I, b) cyclizing 2-(2-oxopentan-3-yl)cyclohexane-1,3-dione to 2-methyl-3-ethyl-4-oxo-4,5,6,7-tetrahydroindole, c) reacting 2-methyl-3-ethyl-4-oxo-4,5,6,7-tetrahydroindole with morpholine and formaldehyde to give molindone (I), and d) optionally converting molindone (I) to its salt. The present invention further provides process for preparation of compound comprising: a) reacting compound with ethyl halide and another halide source to form compound wherein R is alkyl and X is Cl, Br or I; b)converting compound to compound.
    Type: Application
    Filed: February 14, 2020
    Publication date: August 20, 2020
    Applicant: LUPIN LIMITED
    Inventors: Amit Madanrao AGARKAR, Tejas Vilas PURANIK, Rajesh Bharat GAPAT, Umesh Babanrao RANANAWARE, Radhakrishna Bhikaji SHIVDAVKAR, Girij Pal SINGH
  • Publication number: 20190256498
    Abstract: The present invention provides novel crystalline form L1 of daclatasvir dihydrochloride wherein the diffraction peaks at 5.35, 6.04, 6.76, 8.65, 9.21, 10.35, 10.32, 10.75, 11.04, 11.66, 12.95, 13.56, 16.06, 18.11, 20.58, 22.18, 23.27±0.2 degree two theta in an X-ray diffraction pattern. The present invention provides novel crystalline form L2 of daclatasvir dihydrochloride wherein the diffraction peaks at 8.27, 9.54, 11.06, 13.61, 15.34, 19.01, 22.26, 23.24, 24.73, 25.35±0.2 degree two theta in an X-ray diffraction pattern. The present invention further provides process for preparation of crystalline forms L1 and L2 of daclatasvir dihydrochloride.
    Type: Application
    Filed: July 7, 2017
    Publication date: August 22, 2019
    Inventors: Palash SANPHUI, Radhakrishna Bhikaji SHIVDAVKAR, Gurvinder Pal SINGH, Purna Chandra RAY, Girij Pal SINGH, Vikas Ashokrao SADAPHAL, Lalitkumar Dilipising RAJPUT, Hemraj Mahadeorao LANDE
  • Patent number: 10377712
    Abstract: The present invention provides an improved process for preparation of an intermediate of apremilast. The present invention also provides an improved process for preparation of apremilast. This invention also provides novel polymorphs of apremilast. The present invention also provides pharmaceutical compositions of novel polymorphs of apremilast. This invention also provides a process for preparation of novel polymorphs of apremilast, which are cost-effective, robust, and viable at plant scale.
    Type: Grant
    Filed: May 26, 2016
    Date of Patent: August 13, 2019
    Assignee: LUPIN LIMITED
    Inventors: Palash Sanphui, Ananda Pundlik Sapdhare, Arunkumar Digambar Patil, Hemraj Mahadeorao Lande, Gurvinder Pal Singh, Puma Chandra Ray, Nandu Baban Bhise, Girij Pal Singh, Mithun Dasharath Surwase, Shantanu Gokuldas Varade, Govind Dnyanoba Ausekar, Radhakrishna Bhikaji Shivdavkar
  • Publication number: 20180230097
    Abstract: The present invention provides an improved process for preparation of an intermediate of apremilast. The present invention also provides an improved process for preparation of apremilast. This invention also provides novel polymorphs of apremilast. The present invention also provides pharmaceutical compositions of novel polymorphs of apremilast. This invention also provides a process for preparation of novel polymorphs of apremilast, which are cost-effective, robust, and viable at plant scale.
    Type: Application
    Filed: May 26, 2016
    Publication date: August 16, 2018
    Applicant: LUPIN LIMITED
    Inventors: Palash SANPHUI, Ananda Pundlik SAPDHARE, Arunkumar Digambar PATIL, Hemraj Mahadeorao LANDE, Gurvinder Pal SINGH, Purna Chandra RAY, Nandu Bahan BHISE, Girij Pal SINGH, Mithun Dasharath SURWASE, Shantanu Gokuldas VARADE, Govind Dnyanoba AUSEKAR, Radhakrishna Bhikaji SHIVDAVKAR
  • Publication number: 20180099991
    Abstract: The invention relates to salts of Obeticholic Acid, their amorphous and crystalline polymorphic form and processes for preparation thereof.
    Type: Application
    Filed: October 9, 2017
    Publication date: April 12, 2018
    Inventors: Palash Sanphui, Radhakrishna Bhikaji Shivdavkar, Rajesh Vyas, Nandu Baban Bhise, Girij Pal Singh
  • Publication number: 20150225380
    Abstract: The present invention provides a novel method to obtain olmesartan medoxomil (I) with a particle size distribution of less than 30 ?m comprising: dissolving olmesartan medoxomil (I) in a solvent; adding seed crystals of olmesartan medoxomil (I), followed by isolation.
    Type: Application
    Filed: July 26, 2013
    Publication date: August 13, 2015
    Applicant: LUPIN LIMITED
    Inventors: Govind Dnyanoba Ausekar, Radhakrishna Bhikaji Shivdavkar, Himanshu Madhav Godbole, Rajendra Vishwanath Firke, Girij Pal Singh
  • Patent number: 8981110
    Abstract: The present invention provides novel process for preparation of olmesartan medoxomil (I) substantially free of olmesartan acid impurity (II) comprising, reacting trityl olmesartan medoxomil (III) with acid, filtering the precipitate of trityl alcohol, subjecting the filtrate to agitated thin film drying and recovering olmesartan medoxomil (I).
    Type: Grant
    Filed: July 31, 2012
    Date of Patent: March 17, 2015
    Assignee: Lupin Limited
    Inventors: Rajendra Vishwanath Firke, Ujjwal Komalsing Sisodiya, Chandrakant Shriram Bhangale, Radhakrishna Bhikaji Shivdavkar, Himanshu Madhav Godbole, Girij Pal Singh
  • Publication number: 20140179930
    Abstract: The present invention provides novel process for preparation of olmesartan medoxomil (I) substantially free of olmesartan acid impurity (II) comprising, reacting trityl olmesartan medoxomil (III) with acid, filtering the precipitate of trityl alcohol, subjecting the filtrate to agitated thin film drying and recovering olmesartan medoxomil (I).
    Type: Application
    Filed: July 31, 2012
    Publication date: June 26, 2014
    Applicant: LUPIN LIMITED
    Inventors: Rajendra Vishwanath Firke, Ujjwal Komalsing Sisodia, Chandrakant Shriram Bhangale, Radhakrishna Bhikaji Shivdavkar, Himanshu Madhav Godbole, Girij Pal Singh