Patents by Inventor Lutz Mayer

Lutz Mayer 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).

  • Process for coating oxidic fibrous materials with metal aluminates for the production of failure-tolerant, high-temperature resistant, oxidation-resistant composite materials
    Patent number: 6139916
    Abstract: The present invention relates to a process for coating high-temperature-resistant fibrous materials with metal aluminates. The disclosed process includes immersing the starting fibrous material in a sol derived from at least two compounds: a compound of cerium or lanthanum and a compound of aluminum, to deposit a coating of metal aluminate on the fibrous material. The compounds of cerium, lanthanum and aluminum are selected from nitrates, acetates, oxalates and acetylacetonates. After the immersion, the fibrous material is removed from the sol after it is wetted, dried at temperatures of less than 400 degrees C. for at least 1 hour under pressure of less than or equal to 5 mbar and the fibrous material is introduced into a desired matrix at a temperature of more than 600 degrees C.
    Type: Grant
    Filed: July 10, 1998
    Date of Patent: October 31, 2000
    Assignee: DLR Deutsche Zentrum fur Luft und Raumfahrt E.V. Linder Hohe
    Inventors: Bilge Saruhan-Brings, Lutz Mayer, Hartmut Schneider
  • Halogenated polycarbosilanes and processes for preparing them
    Patent number: 5247028
    Abstract: Halogenated polycarbosilanes with uniform or mixed halogenation prepared from aryl-substituted, particularly phenyl-substituted polycarbosilanes by reaction with halogenating reagents under polar or ionic reaction conditions, optionally in the presence of a Lewis acid catalyst. The halogen atom introduced can optionally subsequently be replaced by another halogen atom through a transhalogenation reaction.
    Type: Grant
    Filed: May 5, 1992
    Date of Patent: September 21, 1993
    Assignee: Kali-Chemie AG
    Inventors: Peter Sartori, Wolfgang Habel, Lutz Mayer
  • Polycarbosilanes containing a hetero element
    Patent number: 5204431
    Abstract: Polycarbosilanes in which some of the silicon atoms have been replaced by a hetero element selected from boron, titanium, zirconium, hafnium, etc. The hetero elements are incorporated into the polycarbosilane skeleton in such a way that, like the silicon atoms, they are bonded to the other parts of the polycarbosilanes via hydrocarbon bridges, and the polycarbosilanes are free of hetero element-oxygen-silicon bonds.
    Type: Grant
    Filed: January 21, 1992
    Date of Patent: April 20, 1993
    Assignee: Solvay Deutschland, GmbH
    Inventors: Peter Sartori, Wolfgang Habel, Christopher Nover, Baudouin van Aefferden, Lutz Mayer, Thomas Adrian
  • Halogenated polycarbosilanes and processes for preparing them
    Patent number: 5132375
    Abstract: Halogenated polycarbosilanes with uniform or mixed halogenation prepared from aryl-substituted, particularly phenyl-substituted polycarbosilanes by reaction with halogenating reagents under polar or ionic reaction conditions, optionally in the presence of a Lewis acid catalyst. The halogen atom introduced can optionally subsequently be replaced by another halogen atom through a transhalogenation reaction.
    Type: Grant
    Filed: June 1, 1990
    Date of Patent: July 21, 1992
    Assignee: Kali-Chemie AG
    Inventors: Peter Satori, Wolfgang Habel, Lutz Mayer