Patents by Inventor Doris Hertel

Doris Hertel 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).

  • Ceramic composite
    Patent number: 6254975
    Abstract: A ceramic composite includes (a) 30 to 60% by volume of C-fibers; (b) 10 to 55% by volume of a matrix made of SiC and C, wherein the weight ratio SiC:C is in the range of between 20:1 and 2:1; (c) 5 to 40% by volume porosity that may be open or closed. A base material is formed from a)+b)+c).
    Type: Grant
    Filed: October 22, 1998
    Date of Patent: July 3, 2001
    Assignee: Dornier GmbH
    Inventors: Ursula Kayser, Tilman Haug, Doris Hertel, Kolja Rebstock, Wolfgang Schaefer, Helmut Knabe, Walter Vogel