Patents by Inventor Charles R. Pfeifer

Charles R. Pfeifer 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).

  • Stain resistant composition for synthetic organic polymer fibers and method of use: fluorocarbon polymer
    Patent number: 4861501
    Abstract: An aqueous composition which is capable of rendering fibers repellant to soiling, staining, or combinations thereof. The composition comprises a rewetting agent (i.e., sodium dioctylsulfosuccinate) and a water-repelling fluoroaliphatic radical containing polymer which preferably contains 8 carbon atoms and 15 fluorine atoms.
    Type: Grant
    Filed: May 16, 1988
    Date of Patent: August 29, 1989
    Assignee: BASF Corporation
    Inventor: Charles R. Pfeifer
  • Hydraulic cementitious compositions reinforced with fibers containing polyacrylonitrile
    Patent number: 4772328
    Abstract: A reinforced hydraulic cementitious composition containing a fibrous material comprising a homopolymer of acrylonitrile or a copolymer of acrylonitrile having a molar concentration of acrylonitrile monomer units in the range of from about 98 percent to about 100 percent which has a denier in the range of from about 1 to about 25 and a length of from about 0.15 inch to 1 inch.
    Type: Grant
    Filed: December 18, 1986
    Date of Patent: September 20, 1988
    Assignee: BASF Corporation
    Inventor: Charles R. Pfeifer