Patents by Inventor Ludwig Krickl

Ludwig Krickl 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).

  • Insulating element for building
    Patent number: 5246760
    Abstract: An insulating element for buildings and more particularly for walls, ceilings and roofs, consists of a sheepswool fleece which is sandwiched between two layers of needled non-woven material consisting of sheepswool. The fleece and the needled non-woven material are connected together by fibers thereof to constitute a unit able to be handled as such.
    Type: Grant
    Filed: March 13, 1992
    Date of Patent: September 21, 1993
    Inventor: Ludwig Krickl
  • Insulating element for building
    Patent number: RE37139
    Abstract: An insulating element for buildings and more particularly, for walls, ceilings and roofs, consists of a sheepswool fleece which is sandwiched between two layers of needled non-woven material consisting of sheepswool. The fleece and the needled non-woven material are connected together by fibers thereof to constitute a unit able to be handled as such.
    Type: Grant
    Filed: February 8, 1995
    Date of Patent: April 17, 2001
    Inventor: Ludwig Krickl