Patents Assigned to Matrix Laboratories Limited
  • Publication number: 20130231486
    Abstract: Disclosed herein are novel compounds which are useful as intermediates for producing substituted sulfoxide compounds and a process for producing the same. Further disclosed is a process for producing the substituted sulfoxide compounds used as pharmacologically active agents, employing the novel intermediates of the present invention.
    Type: Application
    Filed: April 11, 2013
    Publication date: September 5, 2013
    Applicant: Matrix Laboratories Limited
    Inventors: Saswata LAHIRI, Lakshmana Rao VADALI, Swamy SAIDUGARI, Verra Narayana BANDLAMUDI, Parameshwar MAKAM, Seshadri Rao MANUKONDA, Debashish DATTA
  • Patent number: 8513427
    Abstract: Disclosed herein are novel compounds which are useful as intermediates for producing substituted sulfoxide compounds and a process for producing the same. Further disclosed is a process for producing the substituted sulfoxide compounds used as pharmacologically active agents, employing the novel intermediates of the present invention.
    Type: Grant
    Filed: September 29, 2009
    Date of Patent: August 20, 2013
    Assignee: Matrix Laboratories Limited
    Inventors: Saswata Lahiri, Lakshmana Rao Vadali, Swamy Saidugari, Verra Narayana Bandlamudi, Parameshwar Makam, Seshadri Rao Manukonda, Debashish Datta
  • Patent number: 8513455
    Abstract: The present invention relates to a crystalline oxybutynin base and process for preparing the same. Further, this invention discloses a process for preparing an acid addition salt of oxybutynin employing the crystalline oxybutynin base.
    Type: Grant
    Filed: February 4, 2009
    Date of Patent: August 20, 2013
    Assignee: Matrix Laboratories Limited
    Inventors: Purna Chandra Ray, Madhuresh Sethi, Sanjay Mahajan, Om Dutt Tyagi
  • Patent number: 8350030
    Abstract: Disclosed herein an improved process for producing 5-Fluoro-1-(2R,5S)-[2-(hydroxymethyl)-1,3-oxathiolan-5-yl]cytosine and its pharmaceutical acceptable salts.
    Type: Grant
    Filed: December 5, 2008
    Date of Patent: January 8, 2013
    Assignee: Matrix Laboratories Limited
    Inventors: Om Dutt Tyagi, Umamaheswar Vasireddy Rao, Vellanki Sivarama Prasad, Arabinda Sahu
  • Patent number: 8329952
    Abstract: The present invention relates to process for the preparation of novel crystalline Desmethylvenlafaxine succinate polymorphic Forms-A, B. The present invention also relates to novel processes for the preparation of 0-Desmethylvenlafaxine succinate polymorphic Forms-(I), (II), (III) and amorphous.
    Type: Grant
    Filed: July 15, 2008
    Date of Patent: December 11, 2012
    Assignee: Matrix Laboratories Limited
    Inventors: Ramakoteswara Rao Jetti, Purandhar Koilkonda, Jagan Mohana Chary Tummanapally, Mohana Vamsi Krishna Vadlamudi, Prasanth Kumar Barik, Om Dutt Tyagi
  • Patent number: 8318930
    Abstract: Disclosed herein is a novel process for preparing polymorphic Forms of (S)-6-chloro-(cyclopropylethynyl)-1,4-di-hydro-4-(trifluoromethyl)-2H-3,1-benzoxazin-2-one referred as M1, I, II, ?, and ?.
    Type: Grant
    Filed: December 24, 2008
    Date of Patent: November 27, 2012
    Assignee: Matrix Laboratories Limited
    Inventors: Om Dutt Tyagi, Ramakoteswara Rao Jetti, B. A. Ramireddy
  • Patent number: 8304578
    Abstract: The present invention relates to an improved, process for large scale production of 1-[2-(dimethylamino)-1-(4-phenol)ethyl]cyclohexanol (O-desmethylvenlafaxine) or its pharmaceutically acceptable salts with increased yield and minimal impurities.
    Type: Grant
    Filed: December 26, 2008
    Date of Patent: November 6, 2012
    Assignee: Matrix Laboratories Limited
    Inventors: Om Dutt Tyagi, Saswata Lahiri, Purandhar Koilkonda, Jagan Mohana Chary Tummanapally, Mohan Vamsi Krishna Vadlamudi, Venkata Bala Kishore Sarma Inupakutika, Surya Nageswara Rao Achanta
  • Publication number: 20110184182
    Abstract: Disclosed herein are novel compounds which are useful as intermediates for producing substituted sulfoxide compounds and a process for producing the same. Further disclosed is a process for producing the substituted sulfoxide compounds used as pharmacologically active agents, employing the novel intermediates of the present invention.
    Type: Application
    Filed: September 29, 2009
    Publication date: July 28, 2011
    Applicant: MATRIX LABORATORIES LIMITED
    Inventors: Saswata Lahiri, Lakshmana Rao Vadali, Swamy Saidugari, Verra Narayana Bandlamudi, Parameshwar Makam, Seshadri Rao Manukonda, Debashish Datta
  • Publication number: 20110144383
    Abstract: Disclosed herein is a process for the preparing (S)-3-(aminomethyl)-5-methylhexanoic acid by optical resolution of (±)-3-(aminomethyl)-5-methylhexanoic acid and a resolving agent employing a suitable solvent.
    Type: Application
    Filed: February 18, 2009
    Publication date: June 16, 2011
    Applicant: MATRIX LABORATORIES LIMITED
    Inventors: Ataharoddin Khala, Venkata Srinivas Rao Potla, Govind Singh Rawat, Babu Rao Konudula, Yogendra Kumar Chauhan, Debashish Datta
  • Patent number: 7943784
    Abstract: The present invention encompasses a method for the preparation of Almotriptan and its pharmaceutically acceptable salts comprises, i) Methylation of 3-[5-(1-Pyrrolidinyl sulfonyl methyl)1H-indol-yl]ethane amine ii) Treating crude Almotriptan with a hydroxy benzoic acid yields hydroxy benzoic acid addition salt of Almotriptan iii) Converting Almotriptan hydroxy benzoic acid addition salt to Almotriptan and iv) Salification of Almotriptan to its pharmaceutically acceptable salts.
    Type: Grant
    Filed: July 21, 2006
    Date of Patent: May 17, 2011
    Assignee: Matrix Laboratories Limited
    Inventors: Satyanarayana Chava, Seeta Ramanjaneyulu Gorantla, Ramdas Chavakula, Babu Rao Konudula
  • Publication number: 20110087042
    Abstract: The present invention relates to a crystalline oxybutynin base and process for preparing the same. Further, this invention discloses a process for preparing an acid addition salt of oxybutynin employing the crystalline oxybutynin base.
    Type: Application
    Filed: February 4, 2009
    Publication date: April 14, 2011
    Applicant: MATRIX LABORATORIES LIMITED
    Inventors: Chandra Purna Ray, Madhuresh Sethi, Sanjay Mahajan, Om Dutt Tyagi
  • Patent number: 7884214
    Abstract: The present invention encompasses a method for the preparation of Telmisartan comprises, through Telmisartan dihydrochloride comprises i) Condensing 4-Methyl-2-n-propyl-1H-benzimidazole-6-carboxylic acid with N-Methyl-O-phenylenediamine dihydrochloride to yields 4-methyl-6 (1-methyl benzimidazol-2-yl)-2-n-propyl 1H-benzimidazole ii) Treating 4-methyl-6-(1-methylbenzimidazol-2-yl)-2-n-propyl-1H-benzimidazole with 4?-(bromomethyl)-2-biphenyl-2-carboxylate in presence of a base in an organic solvent and isolating the ester as acid addition salt iii) Converting ester acid addition salt to Telmisartan dihydrochloride and iv) Converting Telmisartan dihydrochloride to Telmisartan.
    Type: Grant
    Filed: July 19, 2006
    Date of Patent: February 8, 2011
    Assignee: Matrix Laboratories Limited
    Inventors: Satyanarayana Chava, Seeta Ramanjaneyulu Gorantla, Sai Prasanna Bhagya Lakshmi Ginjupalli
  • Publication number: 20100286447
    Abstract: The present invention relates to an improved, process for large scale production of 1-[2-(dimethylamino)-1-(4-phenol)ethyl]cyclohexanol (O-desmethylvenlafaxine) or its pharmaceutically acceptable salts with increased yield and minimal impurities.
    Type: Application
    Filed: December 26, 2008
    Publication date: November 11, 2010
    Applicant: MATRIX LABORATORIES LIMITED
    Inventors: Om Dutt Tyagi, Saswata Lahiri, Purandhar Koilkonda, Jagan Mohana Chary Tummanapally, Mohan Vamsi Krishna Vadlamudi, Venkata Bala Kishore Sarma Inupakutika, Surya Nageswara Rao Achanta
  • Publication number: 20100274007
    Abstract: Disclosed herein is a novel process for preparing polymorphic Forms of (S)-6-chloro-(cyclopropylethynyl)-1,4-di-hydro-4-(trifluoromethyl)-2H-3,1-benzoxazin-2-one referred as M1, I, II, ?, and ?.
    Type: Application
    Filed: December 24, 2008
    Publication date: October 28, 2010
    Applicant: MATRIX LABORATORIES LIMITED
    Inventors: Om Dutt Tyagi, Ram K. R. Jetti, B. A. Ramireddy
  • Publication number: 20100256372
    Abstract: Disclosed herein an improved process for producing 5-Fluoro-1-(2R,5S)-[2-(hydroxymethyl)-1,3-oxathiolan-5-yl]cytosine and its pharmaceutical acceptable salts.
    Type: Application
    Filed: December 5, 2008
    Publication date: October 7, 2010
    Applicant: MATRIX LABORATORIES LIMITED
    Inventors: Om Dutt Tyagi, Umamaheswar Vasireddy Rao, Vellanki Sivarama Prasad, Arabinda Sahu
  • Publication number: 20100191015
    Abstract: The present invention relates to process for the preparation of novel crystalline Desmethylvenlafaxine succinate polymorphic Forms-A, B. The present invention also relates to novel processes for the preparation of 0-Desmethylvenlafaxine succinate polymorphic Forms-(I), (II), (III) and amorphous.
    Type: Application
    Filed: July 15, 2008
    Publication date: July 29, 2010
    Applicant: MATRIX LABORATORIES LIMITED
    Inventors: Ramakoteswara Rao Jetti, Purandhar Koilkonda, Jagan Mohana Chary Tummanapally, Mohana Vamsi, Krishna Vadlamudi, Prasanth Kumar Barik, Om Dutt Tyagi
  • Patent number: 7678903
    Abstract: The present invention relates to an improved process for the preparation of Levofloxacin hemihydrate by adjusting the moisture content of the solvent to about 12% to about 20% during crystallization.
    Type: Grant
    Filed: August 8, 2005
    Date of Patent: March 16, 2010
    Assignee: Matrix Laboratories Limited
    Inventors: Satya-naryana Chava, Seeta Ramanjaneyulu Gorantla, Venkata Panakala Rao
  • Publication number: 20090259051
    Abstract: The present invention relates a novel crystalline 1-(Carbazol-4-yloxy-3-[[2-(o-methoxyphenoxy) ethyl]amino]-2-propanol phosphate sesquihydrate (Carvedilol dihydrogenphosphate sesquihydrate), methods of preparing the sesquihydrate by adding phosphoric acid to a suspension of Carvedilol in water, water miscible solvents or a mixture of water and water miscible organic solvent followed by isolating the product directly or by adding solvent.
    Type: Application
    Filed: June 11, 2007
    Publication date: October 15, 2009
    Applicant: Matrix Laboratories Limited
    Inventors: Seeta Ramanjaneyulu Gorantla, Mohan Bandari, Nageswara Rao Karusala, Sankara Sastry Tummalapalli
  • Publication number: 20080167477
    Abstract: The present invention provides novel crystalline polymorphic forms and amorphous form of carvedilol dihydrogen phosphate characterized by different solid state techniques. The novel processes for their preparation are also disclosed.
    Type: Application
    Filed: September 7, 2007
    Publication date: July 10, 2008
    Applicant: MATRIX LABORATORIES LIMITED
    Inventors: Ramakoteswara Rao JETTI, Asha Rani GORANTLA, Om Dutt TYAGI
  • Patent number: 7365216
    Abstract: The invention relates to a process for the manufacture of salts of citalopram in high purity. By the careful selection of solvents and the careful manipulation of the pH value, citalopram salts may be isolated in the absence of 5-chlorocitalopram, 5-bromocitalo-pram, desmethyl-citalopram and 5-carobxyamide citalopram.
    Type: Grant
    Filed: April 18, 2002
    Date of Patent: April 29, 2008
    Assignee: Matrix Laboratories Limited
    Inventors: Jyothi Basu Abbineni, Hari Babu Bodepudi, Satyanarayana Chava, Venkata Ramana Rao Chunchu