Patents by Inventor Stephen E. Holschbach

Stephen E. Holschbach 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).

  • Fume hood with multifunctional sash lock
    Patent number: 4829887
    Abstract: A laboratory fume hood with at least two vertically-movable sashes and with a control in the form of a multifunctional sash lock that may be selectively positioned to allow only one sash to be opened at a time, or to permit both sashes to be opened but only partially, or to allow both sashes to be opened fully.
    Type: Grant
    Filed: September 26, 1988
    Date of Patent: May 16, 1989
    Assignee: Hamilton Industries, Inc.
    Inventor: Stephen E. Holschbach
  • Fume hood incorporating high efficiency auxiliary air plenum
    Patent number: 4436022
    Abstract: An auxiliary air fume hood provided with an improved airflow system for controlling the passage of air through an auxiliary air housing and orienting the flow of air in front of the face of the hood. The hood is designed to capture the auxiliary air through the face of the hood when the temperature of said air is as much as 20.degree. F. higher than the room air temperature.
    Type: Grant
    Filed: August 28, 1981
    Date of Patent: March 13, 1984
    Assignee: Hamilton Industries, Inc.
    Inventors: Jon A. Zboralski, Harry N. Grow, Stephen E. Holschbach