Patents Represented by Attorney David & Ramond

Find this attorney in the Justia Lawyer Directory

  • Method of producing Betaine compound
    Patent number: 7005543
    Abstract: A process for preparing Anhydrous Betaine and Betaine Hydrochloride comprises treating a chloroacetic acid with sodium carbonate, and then dropping liquid trimethylamine to obtain Betaine products, wherein ion exchange resin and decompression process are utilized to assure the product having high purity and yield rate.
    Type: Grant
    Filed: July 9, 2004
    Date of Patent: February 28, 2006
    Inventor: Jiashu Zhang