Patents by Inventor Renate Gottwarld-Grill

Renate Gottwarld-Grill 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).

  • Cylindrical filter cartridge with support tube
    Publication number: 20020020662
    Abstract: A filter cartridge comprising an annularly closed filter medium provided with end disks (16). Within the interior of the cartridge there is a support tube (24), which is made in one piece and has a radial sealing ring (25) in its interior. The outside diameter of the support tube is chosen such that the support tube can be inserted into the filter cartridge. This produces a sealing effect between the end disks (16) and the outer circumference of the support tube. The filter cartridge of the invention has the advantage of being cost-effective to produce and simple to assemble.
    Type: Application
    Filed: June 18, 2001
    Publication date: February 21, 2002
    Inventors: Renate Gottwarld-Grill, Helmut Luka