Patents by Inventor Robert W. Limes

Robert W. Limes 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).

  • Fire protection materials and methods of making them
    Patent number: 4262055
    Abstract: A fire protection material, suitable for use as a coating for structural members, produced by mixing a lightweight refractory aggregate including magnesia with ammonium phosphates in aqueous solution, wherein the composition of the phosphates is at least about 20% by weight polyphosphates, balance orthophosphate, and allowing the mixture to set as a fire protection coating or body having a bulk density of not more than about 50 lb./ft..sup.3.
    Type: Grant
    Filed: January 8, 1979
    Date of Patent: April 14, 1981
    Assignee: Republic Steel Corporation
    Inventors: Robert O. Russell, Robert W. Limes, Robert C. Best
  • Production of fast-setting bonded aggregate structures
    Patent number: 4059455
    Abstract: A method of preparing a fast-setting concrete or the like by mixing, with an aggregate containing magnesia, ammonium phosphates in aqueous solution, wherein the composition of the phosphates is about 20% to 58% by weight polyphosphates, balance orthophosphate.
    Type: Grant
    Filed: June 17, 1976
    Date of Patent: November 22, 1977
    Assignee: Republic Steel Corporation
    Inventors: Robert W. Limes, Robert O. Russell