Patents Assigned to DISHMAN CARBOGEN AMCIS LIMITED
  • Process for the preparation of indigo carmine
    Patent number: 10738192
    Abstract: The present invention relates to an improved process for preparation of Indigo carmine of Formula (I), in high purity, more than 99.5%.
    Type: Grant
    Filed: November 25, 2016
    Date of Patent: August 11, 2020
    Assignee: DISHMAN CARBOGEN AMCIS LIMITED
    Inventors: Janmejay Rajnikant Vyas, Himani Dhotre, Narasimha Sarma, Dilip N. Patel, Piyush Sangani, Arpan Kiritbhai Shah, Babulal R. Patel, Devang Wadia
  • Process for the preparation of isosulfan blue
    Patent number: 10501629
    Abstract: The present invention relates to process for preparation of Isosulfan blue (Formula I) substantially free from desethyl impurity.
    Type: Grant
    Filed: October 1, 2016
    Date of Patent: December 10, 2019
    Assignee: DISHMAN CARBOGEN AMCIS LIMITED
    Inventors: Janmejay Rajnikant Vyas, Yashbir Singh, Chiragkumar Chandrakantbhai Patel, Sandip Babanrao Pawar, Himani Dhotre, K. Narasimha Sarma, Dilip N. Patel, Renish Ghetiya, Babulal R. Patel, Sarika P. Deshmukh, Girish Mavada
  • Process for the preparation of indocyanine green
    Patent number: 10287436
    Abstract: The present invention involves an improved process for the preparation of Indocyanine green of Formula (I) having high purity of about 99%, wherein the process comprises steps of reacting 1,1,2-trimethyl-1H-benzo[e]indole with 1,4-butane sulfone in boiling solvent to give 4-(1,1,2-trimethyl-1H-benzo[e]indolium-3-yl)butane-1-sulfonate. Followed by reacting 4-(1,1,2-trimethyl-1H-benzo[e]indolium-3-yl)butane-1-sulfonate of Formula (IV) and N-phenyl-N-((1E,3E,5E)-5-(phenylimino)penta-1,3-dienyl)acetamide of formula (V) in presence of sodium acetate and alcohol; and extracting the title compound formula (I) with an ester solvent.
    Type: Grant
    Filed: November 29, 2016
    Date of Patent: May 14, 2019
    Assignee: DISHMAN CARBOGEN AMCIS LIMITED
    Inventors: Janmejay Rajnikant Vyas, Himani Dhotre, Narasimha Sarma, Babulal R. Patel, Dinesh Kumar Sharma, Dilip N. Patel, Ashish A. Soni