Patents by Inventor Sandra K. Kaiser

Sandra K. Kaiser 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).

  • Temperature-phased anaerobic waste treatment process
    Patent number: 5746919
    Abstract: A method of treating a waste stream including the steps of feeding the stream through a thermophilic anaerobic reactor and then a mesophilic anaerobic reactor operated in series.
    Type: Grant
    Filed: May 31, 1996
    Date of Patent: May 5, 1998
    Assignee: Iowa State University Research Foundation, Inc.
    Inventors: Richard R. Dague, William L. Harris, Sandra K. Kaiser
  • Temperature-phased anaerobic waste treatment process
    Patent number: 5525228
    Abstract: A method of treating a waste stream including the steps of feeding the stream through a thermophilic anaerobic reactor and then a mesophilic anaerobic reactor operated in series.
    Type: Grant
    Filed: October 3, 1994
    Date of Patent: June 11, 1996
    Assignee: Iowa State University Research Foundation, Inc.
    Inventors: Richard R. Dague, Sandra K. Kaiser, William L. Harris