Patents by Inventor Dennis E. Bischoff

Dennis E. Bischoff 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).

  • Accelerated stability apparatus
    Patent number: 4167867
    Abstract: An apparatus for testing the stability of a liquid composition comprising a thermal means, one or more liquid sample chambers, one or more reservoirs for a standard solution, a first flow path for extracting a metered quantity of liquid, a second flow path for extracting a metered quantity of standard solution, and valving means for forming said first and second flow paths.
    Type: Grant
    Filed: July 3, 1978
    Date of Patent: September 18, 1979
    Assignee: The Dow Chemical Company
    Inventors: Dennis E. Bischoff, Gary R. Dickinson, Michael E. Hinshaw, Robert M. Brooker
  • Automated apparatus for testing sustained release drugs
    Patent number: 4158694
    Abstract: An automated apparatus for testing a sustained release drug according to a preselected program having a movable dissolution chamber, a first flow path connecting said chamber to a buffer reservoir, a second flow path connecting said chamber to a fluid collection reservoir and a third flow path connecting said chamber to a wash reservoir, and programming means for activating fluid flows between said reservoirs and said dissolution chamber in accordance with a preselected program.
    Type: Grant
    Filed: March 30, 1978
    Date of Patent: June 19, 1979
    Assignee: The Dow Chemical Company
    Inventors: Dennis E. Bischoff, Gary R. Dickinson, Michael E. Hinshaw, Robert M. Brooker