Patents by Inventor Robert Waldbauer

Robert Waldbauer 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).

  • Spandex of a particular composition and process for making same
    Publication number: 20050288477
    Abstract: The invention provides spandex having improved hysteresis and a method for making such spandex. The spandex of the invention comprises the polyurethaneurea reaction product of: (a) poly(tetramethylene ether) glycol (b) 1-isocyanato-4-[(4-isocyanatophenyl)methyl]benzene wherein the mole ratio of diisocyanate to glycol is from about 1.52 to about 2.04; and (c) a mixture of chain extenders comprising: from about 35 to about 55 mole percent ethylene diamine; and from about 45 to about 65 mole percent 1,2-propanediamine.
    Type: Application
    Filed: August 31, 2005
    Publication date: December 29, 2005
    Inventors: Hong Liu, Gregory Yoder, Robert Waldbauer