Patents by Inventor Thomas H. Bier

Thomas H. Bier 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).

  • Degritting and fiber removal system
    Patent number: 3989628
    Abstract: Apparatus for removing grit and fiber from waste activated sewage sludge prior to introduction into a centrifuge for further separation. Grit removal is accomplished by hydrocyclones and fiber removal is carried out on a 300.degree. screen. The hydrocyclones and screen, together with connecting conduits, are conveniently mounted on a supporting frame for facilitating transportation of the unit and for maintaining the predetermined structural relationships of the various members.
    Type: Grant
    Filed: January 3, 1975
    Date of Patent: November 2, 1976
    Assignee: Dorr-Oliver Incorporated
    Inventor: Thomas H. Bier