Patents by Inventor Georg M. Daerr

Georg M. Daerr 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).

  • Production, composition and aftertreatment of mineral fibers for the micro-reinforcement of binders of building materials
    Patent number: 4304604
    Abstract: Method for the production of mineral fibers resistant to alkaline media which are to be used for the micro-reinforcement of cement-, lime- and/or plaster-bound or bituminous binders or building materials. The starting material is a mixture of extrusive rocks with an addition of 4 to 6 weight percent of ZrO.sub.2, based on the end product, in a composition that is readily fusible and easy to process into fibers of high mechanical strength and resistance to alkaline media. The mixture is fused at a temperature between 1350.degree. and 1500.degree. C. and is then processed into fibers 10 to 20 .mu.m in diameter.
    Type: Grant
    Filed: November 5, 1979
    Date of Patent: December 8, 1981
    Assignee: Werhahn & Neuen
    Inventors: Georg M. Daerr, Karl H. Gruenthaler, Hans Gaar