Patents by Inventor Edwin Jahngen

Edwin Jahngen 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).

  • Article and method for detecting skin irritants
    Publication number: 20060147341
    Abstract: An article and method for detecting the presence of skin irritants on a surface. The article comprises cyclodextrin and an indicator. The indicator is configured to react with a polyhydroxyaromatic skin irritant to provide indicia of the presence of the polyhydroxyaromatic skin irritant.
    Type: Application
    Filed: December 30, 2004
    Publication date: July 6, 2006
    Inventors: Edwin Jahngen, Arthur Meuse
  • Gas chromatography oven heaters
    Patent number: 6485543
    Abstract: A gas chromatography system with suspended tubular separation column(s) in an enclosed convection oven where a gas medium is heated by at least two electrically powered heaters. A kit to modify gas chromatographic ovens for operation with at least two electrically powered heaters. The heaters are positioned to promote even heating along the length of the column(s) and shielding of the column(s) from radiant heat. The heaters can provide faster heating rates at elevated temperatures.
    Type: Grant
    Filed: September 16, 2000
    Date of Patent: November 26, 2002
    Inventors: Stephen J. MacDonald, Peter Germano, Edwin Jahngen