Patents by Inventor Yongmei Qin

Yongmei Qin 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).

  • AMLODIPINE DRY SUSPENSION AND PREPARATION METHOD THEREFOR
    Publication number: 20240082160
    Abstract: An amlodipine dry suspension, comprising a diluent, a suspending aid, etc. and being free of surfactants. A preparation method therefor comprises the following steps: a) preparing an aqueous mixture 1 containing amlodipine besylate by using a high-speed homogenization method; b) adding sodium benzoate to the mixture 1, and homogenizing same at a high speed to obtain a mixture 2; and c) granulating the mixture 2 and other components, and then drying same. The raw materials are homogenized and mixed at a high speed, no surfactant is added during the preparation, amlodipine is fully wetted by using a high-speed homogenization process, prescription components are simplified, and the amlodipine dry suspension is more suitable for children to use. Compared with ultrasonic stirring, scaled-up and industrial production are easier to realize for the high-speed homogenization process, and at the same time, the preparation is good in stability and convenient to carry.
    Type: Application
    Filed: December 31, 2021
    Publication date: March 14, 2024
    Inventors: Hanxiong Li, Xianzhu Wang, Weitang Chen, Yuan Chen, Ping Guo, Yongyi Wu, Yongmei Qin, Hongxue Huang, Li Wang
  • Method of purifying a salt, sodium salt and disodium salt of pemetrexed
    Patent number: 8686140
    Abstract: A method of purifying a salt of pemetrexed having a structure of formula (III) by salting-out, wherein if M3+ is H+, then each of M1+ and M2+ is independently H+, Li+, Na+ or K+, provided that both of them are not H+; if M3+ is Li+, Na+ or K+, then each of M1+ and M2+ is independently Li+, Na+ or K+.
    Type: Grant
    Filed: October 21, 2008
    Date of Patent: April 1, 2014
    Assignee: Chongqing Pharmaceutical Research Institute Co., Ltd.
    Inventors: Jie Luo, Meng Lin, Bo Lin, Wenrun Ye, Yongmei Qin, Jie Deng
  • Crystalline forms of Pemetrexed diacid, and preparations thereof
    Patent number: 8324382
    Abstract: Three new crystalline forms of pemetrexed diacid, preparation methods and uses thereof are disclosed. These preparation processes are simple and have better practicality.
    Type: Grant
    Filed: September 21, 2009
    Date of Patent: December 4, 2012
    Assignee: Chongqing Pharmaceutical Research Institute Co., Ltd.
    Inventors: Jie Luo, Meng Lin, Zhengyong Zhu, Junlai Luo, Wenrun Ye, Yongmei Qin, Jie Deng
  • NEW CRYSTALLINE FORMS OF PEMETREXED DIACID, AND PREPARATIONS THEREOF
    Publication number: 20110172424
    Abstract: Three new crystalline forms of pemetrexed diacid, preparation methods and uses thereof are disclosed. These preparation processes are simple and have better practicality.
    Type: Application
    Filed: September 21, 2009
    Publication date: July 14, 2011
    Applicant: Chongqing Pharmaceutical Research Institute Co., LTD.
    Inventors: Jie Luo, Meng Lin, Zhengyong Zhu, Junlai Luo, Wenrun Ye, Yongmei Qin, Jie Deng
  • METHOD OF PURIFYING A SALT, SODIUM SALT AND DISODIUM SALT OF PEMETREXED
    Publication number: 20100305319
    Abstract: A method of purifying a salt of pemetrexed have a structure of formula (III) by salting-out, wherein if M3+ is H+, then each of M1+ and M2+ is independently H+, Li+, Na+ or K+, provided that both of them are not H+; if M3+ is Li+, Na+ or K+, then each of M1+ and M2+ is independently Li+, Na+ or K+.
    Type: Application
    Filed: October 21, 2008
    Publication date: December 2, 2010
    Applicant: Chongquing Pharmaceutical Research Institute Co. ltd
    Inventors: Jie Luo, Meng Lin, Bo Lin, Wenrun Ye, Yongmei Qin, Jie Deng