Patents by Inventor Erwin Princz

Erwin Princz 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).

  • Coffee percolator
    Patent number: 4732079
    Abstract: Described is a coffee percolator having a coffee meal supply container mounted at an upper portion thereof, in which heating of the coffee meal supply by the heat of the coffee percolator and the resultant loss of volatile aroma substances are avoided. This is accomplished by providing a cooling system effective to cool the bottom of the supply container. In a preferred embodiment the supply container is cooled by means of air aspirated by a fan through an air flow path extending along the bottom of the supply container and subsequently returned to the environmental atmosphere.
    Type: Grant
    Filed: February 25, 1986
    Date of Patent: March 22, 1988
    Assignee: Wurttembergische Metallwarenfabrik AG.
    Inventors: Erwin Princz, Hans Motsch, Peter Pulvermuller