Patents by Inventor Vladimir Tsvetanov

Vladimir Tsvetanov 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 FIBER BOARD AND METHOD FOR PRODUCING GYPSUM FIBER BOARDS
    Publication number: 20200181022
    Abstract: A gypsum fiber board produced in a Siempelkamp dry-process, comprising 75 wt % to 90 wt % (relative to the total dry mix) of calcium sulfate hemi-hydrate and 10 wt % to 25 wt % (relative to the total dry mix) paper fibers, wherein the calcium sulfate hemi-hydrate is a mixture of ?-calcium sulfate hemi-hydrate and ?-calcium sulfate hemi-hydrate, wherein the content of ?-calcium sulfate hemi-hydrate in the mixture is at least 5 wt % (relative to the total calcium sulfate hemi-hydrate) is disclosed. Also disclosed is a method for producing a gypsum fiber board of a thickness of 23 mm in a Siempelkamp dry-process.
    Type: Application
    Filed: February 18, 2020
    Publication date: June 11, 2020
    Inventors: Wolfgang Voigt, Lothar Scheller, Jurgen Burczeck, Vladimir Tsvetanov, Vanya Ivanova-Tsaneva
  • Gypsum fiber board and method for producing gypsum fiber boards
    Patent number: 10562817
    Abstract: A gypsum fiber board produced in a Siempelkamp dry-process, comprising 75 wt % to 90 wt % (relative to the total dry mix) of calcium sulfate hemi-hydrate and 10 wt % to 25 wt % (relative to the total dry mix) paper fibers, wherein the calcium sulfate hemi-hydrate is a mixture of ?-calcium sulfate hemi-hydrate and ?-calcium sulfate hemi-hydrate, wherein the content of ?-calcium sulfate hemi-hydrate in the mixture is at least 5 wt % (relative to the total calcium sulfate hemi-hydrate) is disclosed. Also disclosed is a method for producing a gypsum fiber board of a thickness of 23 mm in a Siempelkamp dry-process.
    Type: Grant
    Filed: June 20, 2017
    Date of Patent: February 18, 2020
    Assignee: Knauf Gips KG
    Inventors: Wolfgang Voigt, Lothar Scheller, Jurgen Burczeck, Vladimir Tsvetanov, Vanya Ivanova-Tsaneva
  • GYPSUM FIBER BOARD AND METHOD FOR PRODUCING GYPSUM FIBER BOARDS
    Publication number: 20170362126
    Abstract: A gypsum fiber board produced in a Siempelkamp dry-process, comprising 75 wt % to 90 wt % (relative to the total dry mix) of calcium sulfate hemi-hydrate and 10 wt % to 25 wt % (relative to the total dry mix) paper fibers, wherein the calcium sulfate hemi-hydrate is a mixture of ?-calcium sulfate hemi-hydrate and ?-calcium sulfate hemi-hydrate, wherein the content of ?-calcium sulfate hemi-hydrate in the mixture is at least 5 wt % (relative to the total calcium sulfate hemi-hydrate) is disclosed. Also disclosed is a method for producing a gypsum fiber board of a thickness of 23 mm in a Siempelkamp dry-process.
    Type: Application
    Filed: June 20, 2017
    Publication date: December 21, 2017
    Inventors: Wolfgang Voigt, Lothar Scheller, Jurgen Burczeck, Vladimir Tsvetanov, Vanya Ivanova-Tsaneva