Patents by Inventor Theodore F. Biermann

Theodore F. Biermann 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).

  • Structures exhibiting improved transmission of ultrahigh frequency electromagnetic radiation and structural materials which allow their construction
    Patent number: 5167870
    Abstract: Radomes having increased transparency and reduced reflectivity and refractivity to radar waves may be prepared or repaired utilizing heat-curable resin-containing structural materials in which the heat-curable resin contains greater than about 70 weight percent of cyanate functional monomers. The structural materials take the form of matrix resin impregnated prepegs and composites, film adhesives, paste adhesives, syntactic foams, and expandable foams, and may be used to prepare numerous useful structural features including honeycomb materials and leading edge radomes containing syntactic foams.
    Type: Grant
    Filed: July 19, 1990
    Date of Patent: December 1, 1992
    Assignee: BASF Aktiengesellschaft
    Inventors: Jack D. Boyd, Hermann Sitt, Hong-Son Ryang, Theodore F. Biermann
  • Structures exhibiting improved transmission of ultrahigh frequency electromagnetic radiation and structural materials which allow their construction
    Patent number: 5134421
    Abstract: Radomes having increased transparency and reduced reflectivity and refractivity to radar waves may be prepared or repaired utilizing heat-curable resin-containing structural materials in which the heat-curable resin contains greater than about 70 weight percent of cyanate functional monomers. The structural materials take the form of matrix resin impregnated prepegs and composites, film adhesives, paste adhesives, syntactic foams, and expandable foams, and may be used to prepare numerous useful structural features including honeycomb materials and leading edge radomes containing syntactic foams. The heat-curable resins further facilitate the preparation of low observable structures.
    Type: Grant
    Filed: September 10, 1990
    Date of Patent: July 28, 1992
    Assignee: BASF Aktiengesellschaft
    Inventors: Jack D. Boyd, Hermann Sitt, Hong-Son Ryang, Theodore F. Biermann
  • Structures exhibiting improved transmission of ultrahigh frequency electromagnetic radiation and structural materials which allow their construction
    Patent number: 4956393
    Abstract: Radomes having increased transparency and reduced reflectivity and refractivity to radar waves may be prepared or repaired utilizing heat-curable resin-containing structural materials in which the heat-curable resin contains greater than about 70 weight percent of cyanate functional monomers. The structural materials take the form of matrix resin impregnated prepegs and composites, film adhesives, paste adhesives, syntactic foams, and expandable foams, and may be used to prepare numerous useful structural features including honeycomb materials and leading edge radomes containing syntactic foams.
    Type: Grant
    Filed: August 29, 1988
    Date of Patent: September 11, 1990
    Assignee: BASF Aktiengesellschaft
    Inventors: Jack D. Boyd, Hermann Sitt, Hong-Son Ryang, Theodore F. Biermann
  • Extreme damage tolerant graphite composites and method of making same
    Patent number: 4908088
    Abstract: Multilayer prepregs containing an engineering thermoplastic film laminated to a cyanate-functional thermosetting resin-impregnated fiber reinforcement are capable of preparing structural composites with extreme damage tolerance.
    Type: Grant
    Filed: February 29, 1988
    Date of Patent: March 13, 1990
    Assignee: BASF Aktiengesellschaft
    Inventors: Jack D. Boyd, William T. Mead, Theodore F. Biermann