Patents by Inventor Felix Friedel

Felix Friedel 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).

  • Gypsum plasterboard
    Patent number: 11104614
    Abstract: The invention concerns a gypsum plasterboard (10) comprising at least an upper gypsum layer (16) having a first density, first hardness and first thickness and a lower gypsum layer (17) having a second density, a second hardness and a second thickness. The first density is lower than the second density and/or the first hardness is lower than the second hardness, and the first thickness is lower than the second thickness. The plasterboard according to the invention are heavy or dense plasterboards with an enhanced fixing ability.
    Type: Grant
    Filed: December 20, 2016
    Date of Patent: August 31, 2021
    Assignee: Knauf Gips KG
    Inventors: Dominik Herfurth, Felix Friedel
  • Gypsum Plasterboard
    Publication number: 20200255335
    Abstract: The invention concerns a gypsum plasterboard (10) comprising at least an upper gypsum layer (16) having a first density, first hardness and first thickness and a lower gypsum layer (17) having a second density, a second hardness and a second thickness. The first density is lower than the second density and/or the first hardness is lower than the second hardness, and the first thickness is lower than the second thickness. The plasterboard according to the invention are heavy or dense plasterboards with an enhanced fixing ability.
    Type: Application
    Filed: December 20, 2016
    Publication date: August 13, 2020
    Inventors: Dominik Herfurth, Felix Friedel