Patents by Inventor Ray C. Wang

Ray C. 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).

  • Method and apparatus for recovering process liquid and eliminating trapped air
    Patent number: 5989317
    Abstract: The present invention discloses a closed-loop method for recovering a process liquid and eliminating trapped air contained in the process liquid by utilizing a manual pump having generally a bellow construction for transporting the process liquid that contains trapped air back into a liquid reservoir for venting the trapped air.
    Type: Grant
    Filed: May 14, 1997
    Date of Patent: November 23, 1999
    Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.
    Inventors: Cheng H. Huang, Ray C. Wang, Teh Y. Liu, Cheng H. Chao