Patents Assigned to Daewoong Chemical Co., Ltd.
  • Process for preparing crystalline form A of Lansoprazole
    Patent number: 8039631
    Abstract: The present invention relates to a process for preparing Crystalline Form A of Lansoprazole. Specifically, the present invention relates to a process for preparing highly pure Crystalline Form A of Lansoprazole in a large scale without any additional conversion step, even by using ethanol in which Crystalline Form B is easily formed.
    Type: Grant
    Filed: January 4, 2007
    Date of Patent: October 18, 2011
    Assignees: Daewoong Pharmaceutical Co., Ltd., Daewoong Chemical Co., Ltd.
    Inventors: Seong Cheol Moon, In Woong Song, Doo Sung Kang, Seong Soo Oh, Sung Jae Lee
  • Process For Preparing Crystalline Form A Of Lansoprazole
    Publication number: 20090018339
    Abstract: The present invention relates to a process for preparing Crystalline Form A of Lansoprazole. Specifically, the present invention relates to a process for preparing highly pure Crystalline Form A of Lansoprazole in a large scale without any additional conversion step, even by using ethanol in which Crystalline Form B is easily formed.
    Type: Application
    Filed: January 4, 2007
    Publication date: January 15, 2009
    Applicants: Daewoong Pharmaceutical Co., Ltd., Daewoong Chemical Co., Ltd.
    Inventors: Seong Cheol Moon, In Woong Song, Doo Sung Kang, Seong Soo Oh, Sung Jae Lee