Patents by Inventor Dirk Frehe

Dirk Frehe 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).

  • Method for producing fireproof materials based on sodium silicate
    Patent number: 11834376
    Abstract: The present invention concerns a process for the production of a solid fire protection material. The composition for producing the fire protection material contains at least one water glass and microcapsules provided with propellant gas. The fire protection material is formed by expanding the microcapsules or by breaking the polymer material of the shell of the microcapsules by the influence of temperature or by adding an agent which breaks the shell of the microcapsules.
    Type: Grant
    Filed: October 1, 2018
    Date of Patent: December 5, 2023
    Inventors: Dirk Frehe, Heike Huth