Patents by Inventor Guenther Ernst Elfert

Guenther Ernst Elfert 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).

  • Patent number: 6170268
    Abstract: This application relates to a novel method and apparatus for hydrating, freezing and cutting packaged hydration material. More particularly, this invention pertains to a novel method and apparatus for drawing unhydrated sandwich packaged hydration gel material from a roll of such material, hydrating the material in a hydration tank, freezing the hydrated material in a freezing chamber, and cutting the frozen hydrated material into pieces according to prescribed lengths. A process of continuously hydrating, freezing and cutting a hydratable polymer containing web of material which comprises: (a) passing the web into a water hydration vessel for sufficient time to hydrate the hydratable polymer; (b) withdrawing the web from the hydration vessel and passing the web through a freezer for sufficient time to enable the web to freeze; and (c) withdrawing the frozen web from the freezer and cutting the frozen web into prescribed lengths.
    Type: Grant
    Filed: September 28, 1998
    Date of Patent: January 9, 2001
    Assignee: Weyerhaeuser Company
    Inventors: Guenther Ernst Elfert, Hans-Ulrich Elfert