Patents by Inventor John K. Powers

John K. Powers 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).

  • Patent number: 11923501
    Abstract: A solid-state electrolyte for a multilayer solid-state electrochemical cell is described herein. The electrolyte comprises a lithium electrolyte salt and nanofibers of a cubic phase lithium lanthanum zirconium oxide (c-LLZO), and a polymer interspersed with the nanofibers and electrolyte salt. Electrochemical cells comprising the solid-state electrolyte, and solid-state cathodes comprising the nanofibers of c-LLZO are also described herein.
    Type: Grant
    Filed: September 30, 2021
    Date of Patent: March 5, 2024
    Assignee: UCHICAGO ARGONNE, LLC
    Inventors: Yuepeng Zhang, Sanja Tepavcevic, Devon J. Powers, Peter Zapol, John N. Hryn, Gregory K. Krumdick, Ozgenur Kahvecioglu, Krzystof Z. Pupek, Michael John Counihan
  • Patent number: 4403827
    Abstract: A diffraction grating is formed by depositing a glass film on a substrate and thereafter applying to the glass film a layer that is highly absorptive to radiation of a specific wavelength. The highly absorptive layer is then coated with a photoresist that is transparent and photosensitive to light of the specific wavelength. Next the photoresist layer is exposed with a holographic image of a desired grating pattern, and the exposed areas are carried away in a developing solution, leaving the photoresist with a grating pattern consisting of a series of closely spaced ridges separated by voids. During the exposure of the photoresist, the absorbing layer absorbs most of the radiation that penetrates the photoresist and thereby prevents that radiation from reflecting from the glass layer or the substrate and creating a pronounced standing wave pattern. A wave pattern of that nature would expose the photoresist in undesired areas, resulting in weakened ridges during the subsequent development.
    Type: Grant
    Filed: September 12, 1980
    Date of Patent: September 13, 1983
    Assignee: McDonnell Douglas Corporation
    Inventors: David A. Bryan, John K. Powers