Patents by Inventor Wing Sum Cheung

Wing Sum Cheung 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).

  • Process for obtaining a rabbit skin comprising biological active substances
    Patent number: 8900639
    Abstract: The present invention relates to a process for obtaining a rabbit skin containing biologically active substances. The rabbit skin extract is obtained by the process including vaccinating a rabbit subcutaneously with vaccinia virus, feeding the rabbit, killing the rabbit when the skin is inflamed, skinning the rabbit within 15 minutes of death, preserving the rabbit skin at ?18 degrees Celsius, extracting a portion of the rabbit skin with a phenol solution at 4° C., processing the rabbit skin extract with an acid and an alkali, eluting the rabbit skin extract and fractioning under a nitrogen atmosphere the eluted portion of the rabbit skin extract. The rabbit skin of the present invention can be used for preparing drugs and health foods.
    Type: Grant
    Filed: February 26, 2013
    Date of Patent: December 2, 2014
    Assignee: Vanworld Pharmaceutical (Rugao) Company Limited
    Inventor: Wing Sum Cheung
  • PROCESS FOR OBTAINING A RABBIT SKIN COMPRISING BIOLOGICAL ACTIVE SUBSTANCES
    Publication number: 20110003009
    Abstract: The present invention relates to a process for obtaining a rabbit skin containing biologically active substances. The rabbit skin extract is obtained by the process including vaccinating a rabbit subcutaneously with vaccinia virus, feeding the rabbit, killing the rabbit when the skin is inflamed, skinning the rabbit within 15 minutes of death, preserving the rabbit skin at ?18 degrees Celsius, extracting a portion of the rabbit skin with a phenol solution at 4° C., processing the rabbit skin extract with an acid and an alkali, eluting the rabbit skin extract and fractioning under a nitrogen atmosphere the eluted portion of the rabbit skin extract. The rabbit skin of the present invention can be used for preparing drugs and health foods.
    Type: Application
    Filed: September 13, 2010
    Publication date: January 6, 2011
    Applicant: VANWORLD PHARMACEUTICAL (RUGAO) COMPANY LIMITED
    Inventor: Wing Sum Cheung