Patents by Inventor David E. Sitterud

David E. Sitterud 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 blending process materials
    Patent number: 7344298
    Abstract: A method and apparatus for blending and supplying process materials. The method and apparatus are particularly applicable to the blending of ultra-high purity chemicals, the blending of abrasive slurries with other chemicals for the polishing of semiconductor wafers, and high-accuracy blending of chemicals.
    Type: Grant
    Filed: July 18, 2003
    Date of Patent: March 18, 2008
    Assignee: Celerity, Inc.
    Inventors: Jeffrey A. Wilmer, Brian Alan McAllister, Daniel A. Swan, David E. Sitterud