Patents by Inventor Yongehun Tang

Yongehun Tang 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).

  • ?-Hydroxy-?-methylbutyric (HMB) acid purification method
    Patent number: 9598344
    Abstract: The present invention relates generally to the field of chemical synthesis. Specifically, the present invention relates to a method for purification of ?-hydroxyl-?-methyl butyrate comprising (1) neutralizing a crude ?-hydroxyl-?-methyl butyrate; (2) cooling and crystallizing the crude ?-hydroxyl-?-methyl butyrate solution to create a ?-hydroxyl-?-methyl butyrate salt; (3) dissolving and acidifying the salt; and (4) extracting the resultant high purity ?-hydroxyl-?-methyl butyrate. Additionally, the present invention relates to a method of obtaining high purity ?-hydroxyl-?-methyl butyrate at normal temperature and vacuum conditions.
    Type: Grant
    Filed: December 6, 2013
    Date of Patent: March 21, 2017
    Inventors: Ling Long, Yongehun Tang
  • Beta-HYDROXY-Beta-METHYLBUTYRIC ACID PURIFICATION METHOD
    Publication number: 20160052856
    Abstract: The present invention relates to a method for purifying ?-hydroxyl-?-methyl butyrate, comprising neutralizing a crude ?-hydroxyl-?-methyl butyrate with a base to produce a salt of ?-hydroxyl-?-methyl butyrate, cooling and crystallizing, dissolving and acidifying, and extracting to obtain ?-hydroxyl-?-methyl butyrate of high purity. No strict conditions, such as high temperature and high vacuum, are required in this method. On the contrary, it has low requirement on the apparatus, the process can readily be controlled and a product with high purity can be produced.
    Type: Application
    Filed: December 6, 2013
    Publication date: February 25, 2016
    Inventors: Ling Long, Yongehun Tang