Patents by Inventor Joel Walenga

Joel Walenga 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).

  • Indoor air purification system
    Patent number: 6280691
    Abstract: The present invention relates to a system for indoor air purification system to and particularly to a system for removing particulates, biologicals, and gaseous chemical contaminates through the use of low room temperature catalysts, a closed cycle heat exchanger a HEPA filter and polisher for removing NOx and SOx from the air flow.
    Type: Grant
    Filed: March 31, 1998
    Date of Patent: August 28, 2001
    Assignee: AlliedSignal Inc.
    Inventors: Stephen T. Homeyer, Joel Walenga, Carlos Cavalca