Patents by Inventor Der-Haw Wang

Der-Haw Wang 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).

  • Synthesis of 4-substituted phthalaldehyde
    Patent number: 6891069
    Abstract: Disclosed herein are methods of synthesizing a 4-substituted-benzene-1,2-carbaldehyde. In one aspect, a method may include reacting a 4-substituted-1,2-bis(dibromomethyl) benzene with sulfuric acid to form a reaction product, introducing a solid sodium bicarbonate into the reaction product, and hydrolyzing the reaction product to form a 4-substituted-benzene-1,2-carbaldehyde, after introducing the bicarbonate.
    Type: Grant
    Filed: January 30, 2004
    Date of Patent: May 10, 2005
    Assignee: Ethicon, Inc.
    Inventors: Peter C. Zhu, Der-Haw Wang