Patents by Inventor David E. Roth

David E. Roth 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: 11208155
    Abstract: Presented are multilayer, fiber-reinforced impact protection structures with honeycomb-core or corrugated-layer designs, methods for making/using such structures, and vehicles with traction battery packs supported on skid plates fabricated from such structures. A multilayer impact protection structure includes a first layer with continuous fibers embedded in a polymeric matrix, and a second layer that is attached to the first layer and includes an elastomeric polymer. A third layer, which is attached to one side of the first layer opposite that of the second layer, includes a fiber-reinforced polymer honeycomb and/or corrugated structure. An optional fracture detection circuit is attached to the first or third layer, and is configured to detect a break in the impact protection structure. The corrugated structure may include multiple reinforcement ribs that are interposed within and substantially orthogonal to a series of mutually parallel, elongated ridges.
    Type: Grant
    Filed: January 13, 2020
    Date of Patent: December 28, 2021
    Assignee: GM Global Technology Operations LLC
    Inventors: Venkateshwar R. Aitharaju, Xiaosong Huang, Gurpinder Dhaliwal, David E Roth, Tejas R. Bhavsar
  • Publication number: 20210214021
    Abstract: Presented are multilayer, fiber-reinforced impact protection structures with honeycomb-core or corrugated-layer designs, methods for making/using such structures, and vehicles with traction battery packs supported on skid plates fabricated from such structures. A multilayer impact protection structure includes a first layer with continuous fibers embedded in a polymeric matrix, and a second layer that is attached to the first layer and includes an elastomeric polymer. A third layer, which is attached to one side of the first layer opposite that of the second layer, includes a fiber-reinforced polymer honeycomb and/or corrugated structure. An optional fracture detection circuit is attached to the first or third layer, and is configured to detect a break in the impact protection structure. The corrugated structure may include multiple reinforcement ribs that are interposed within and substantially orthogonal to a series of mutually parallel, elongated ridges.
    Type: Application
    Filed: January 13, 2020
    Publication date: July 15, 2021
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Venkateshwar R. Aitharaju, Xiaosong Huang, Gurpinder Dhaliwal, David E Roth, Tejas R. Bhavsar
  • Patent number: 6293124
    Abstract: A refrigerated serving device is disclosed. The refrigerated serving device is portable. It includes a food chilling area. A compressor is operatively connected to an evaporator coil and a condenser coil forming a refrigeration unit which maintains the food chilling area at a desired temperature.
    Type: Grant
    Filed: June 16, 2000
    Date of Patent: September 25, 2001
    Assignee: DeLau Innovations, Ltd.
    Inventors: Robin P. Roth, David E. Roth, James D. Woltz
  • Patent number: 6244067
    Abstract: A refrigerated serving device is disclosed. The refrigerated serving device is portable. It includes a food chilling area. A compressor is operatively connected to an evaporator coil and a condenser coil forming a refrigeration unit which maintains the food chilling area at a desired temperature.
    Type: Grant
    Filed: January 7, 1998
    Date of Patent: June 12, 2001
    Assignee: DeLau Innovations, Ltd.
    Inventors: Robin P. Roth, David E. Roth, James D. Woltz
  • Patent number: 5722254
    Abstract: A refrigerated serving device is disclosed. The refrigerated serving device is portable. It includes a food chilling area. A compressor is operatively connected to an evaporator coil and a condenser coil forming a refrigeration unit which maintains the food chilling area at a desired temperature.
    Type: Grant
    Filed: June 5, 1996
    Date of Patent: March 3, 1998
    Assignee: DeLau Innovations, Ltd.
    Inventors: Robin P. Roth, David E. Roth, James D. Woltz