Patents by Inventor Rongfu Shi

Rongfu Shi 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).

  • High selectively polymeric adsorbent based on the hydrogen bonding interaction and the use thereof in isolation and purification of active components from gingko biloba extract
    Patent number: 8466298
    Abstract: Provided are a kind of high selectivity polymeric adsorbents with amide functional groups based on the hydrogen bonding interaction, which is prepared by adequately swelling a DVB-co-MA copolymer of 6% crosslinking degree as the initial resin with dimethyl formamide, performing an amination reaction by adding a diamine, soaking the dried resultant yellow resin with an acylating agent that is a dianhydride, and performing an acylation reaction to obtain the polymeric adsorbent with amide functional groups of the invention. The polymeric adsorbent of the invention can be used to effectively isolate and purify the active ingredients, i.e., flavones and lactones, from the extract of ginkgo leaf.
    Type: Grant
    Filed: February 12, 2009
    Date of Patent: June 18, 2013
    Assignee: Nankai University
    Inventors: Zhi Yuan, Chunhong Wang, Rongfu Shi, Jing Zhang, Ping Ren, Yingchao Chen
  • High Selectivity Hydrogen Bonding Polymeric Adsorbent and its Application on the Separation and Purification of Effective Constituents from Ginkgo Extract
    Publication number: 20110218346
    Abstract: Provided are a kind of high selectivity polymeric adsorbents with amide functional groups based on the hydrogen bonding interaction, which is prepared by adequately swelling a DVB-co-MA copolymer of 6% crosslinking degree as the initial resin with dimethyl formamide, performing an amination reaction by adding a diamine, soaking the dried resultant yellow resin with an acylating agent that is a dianhydride, and performing an acylation reaction to obtain the polymeric adsorbent with amide functional groups of the invention. The polymeric adsorbent of the invention can be used to effectively isolate and purify the active ingredients, i.e., flavones and lactones, from the extract of ginkgo leaf.
    Type: Application
    Filed: February 12, 2009
    Publication date: September 8, 2011
    Applicant: NANKAI UNIVERSITY
    Inventors: Zhi Yuan, Chunhong Wang, Rongfu Shi, Jing Zhang, Ping Ren, Yingchao Chen