Patents by Inventor John C. Dryden

John C. Dryden 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).

  • Cleaning device for a clean room
    Patent number: 5364425
    Abstract: A cleaning device for a clean room has at least two filter-fan units each comprising a filter and a fan. Connecting elements connect the filter-fan units to one another to form a self-supporting construction unit. Each filter-fan unit comprises a housing having profiled elements for engaging the connecting elements in the form of bars or angled pieces. The connecting elements can be T-shaped or cross-shaped. The construction units can be supported on supports on the floor or suspended from the ceiling.
    Type: Grant
    Filed: June 11, 1993
    Date of Patent: November 15, 1994
    Assignee: Meissner + Wurst GmbH + Co. Lufttechnische Anlagen Gebaude- Und Verfahrenstechnik
    Inventors: Rudolf Simon, John C. Dryden, Franz Schlitz