Patents by Inventor Haijian Chen

Haijian Chen 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).

  • Patent number: 11975000
    Abstract: The present invention provides an oral transmucosal film for delivering tadalafil through the buccal mucosa or sublingual mucosa. The film is a single layer structure containing amorphous tadalafil, one or more solubilizers, one or more penetration enhancers, and one or more adhesives to deliver the drug through a transmucosal route. Comparing with an oral tadalafil tablet, the present oral transmucosal film provides improved absorption rate and Tmax. The oral transmucosal film comprises 5%-60% by weight of amorphous tadalafil, 25-96% by weight of a film-forming material, 1-20% by weight of a solubilizer, 0.5-10% by weight of a penetration enhancer, and 1-15% by weight of an adhesive.
    Type: Grant
    Filed: November 10, 2023
    Date of Patent: May 7, 2024
    Assignee: XIAMEN LP PHARMACEUTICAL CO., LTD.
    Inventors: Avinash Singh, Rongbin Ling, Liyuan Chen, Fuxiang Lin, Haijian Zhu
  • Patent number: 7219038
    Abstract: The invention described herein details a protocol to improve analysis and peak identification in spectroscopic data. Bayesian methods are used to automatically identify peaks in data sets. After identifying peak shapes, the method tests the hypothesis that a given number of peaks is found within any given data window. If a peak is identified within a given window, then the likelihood function is maximized in order to estimate peak position and amplitude. This process yields a spectrum with high resolution and minimal artifacts. The method described herein is particularly useful for identifying peaks in data sets obtained from spectroscopy.
    Type: Grant
    Filed: March 22, 2006
    Date of Patent: May 15, 2007
    Assignee: College of William and Mary
    Inventors: Eugene R Tracy, Haijian Chen, William E Cooke
  • Publication number: 20060217938
    Abstract: The invention described herein details a protocol to improve analysis and peak identification in spectroscopic data. Bayesian methods are used to automatically identify peaks in data sets. After identifying peak shapes, the method tests the hypothesis that a given number of peaks is found within any given data window. If a peak is identified within a given window, then the likelihood function is maximized in order to estimate peak position and amplitude. This process yields a spectrum with high resolution and minimal artifacts. The method described herein is particularly useful for identifying peaks in data sets obtained from spectroscopy.
    Type: Application
    Filed: March 22, 2006
    Publication date: September 28, 2006
    Inventors: Eugene Tracy, Haijian Chen, William Cooke
  • Patent number: D1018853
    Type: Grant
    Filed: September 14, 2022
    Date of Patent: March 19, 2024
    Inventor: Haijian Chen
  • Patent number: D1018860
    Type: Grant
    Filed: September 12, 2022
    Date of Patent: March 19, 2024
    Inventor: Haijian Chen