Patents by Inventor Stephan W. Boppart

Stephan W. Boppart 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 of controlling the solvent vapor concentration in an apparatus
    Patent number: 5277716
    Abstract: The solvent vapor concentration which is mixed with air and is obtained in the treatment of articles in an apparatus is controlled in the apparatus by a method comprising the following steps:a) passing gaseous solvent vapor/air mixture from the apparatus through at least one adsorber containing an adsorbent for the organic solvent and recycling the outlet gas stream from the adsorber to the apparatus;b) after completion of the adsorption, opening the apparatus to enable removal of treated articles from the apparatus and closing the apparatus;c) heating the adsorbent and passing a gas stream from the apparatus through the adsorber and recycling the outlet stream from the adsorber directly to the apparatus.
    Type: Grant
    Filed: June 17, 1991
    Date of Patent: January 11, 1994
    Assignee: The Dow Chemical Company
    Inventors: Stephan W. Boppart, Marius A. M. Kumin