Patents by Inventor Joseph C. Blum

Joseph C. Blum 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).

  • Two-dimensional perovskite compositions and devices therefrom
    Patent number: 11964994
    Abstract: The present disclosure relates to a composition that includes a perovskite of A2BX4, where A includes an R-form of a chiral molecule of at least one of and/or an S-form of the chiral molecule, B includes a cation, X includes an anion, R1 includes a first carbon chain having between 2 and 5 carbon atoms, R2 includes at least one of a hydrogen atom, a halogen atom, a carboxylic acid group, an alkoxy group, and/or a second carbon chain, and R3 includes a third carbon chain.
    Type: Grant
    Filed: December 2, 2020
    Date of Patent: April 23, 2024
    Assignees: Alliance for Sustainable Energy, LLC, Duke University
    Inventors: Matthew C. Beard, Haipeng Lu, Annalise Elizabeth Maughan, Joseph Jonathan Berry, Zeev Valentine Vardeny, Chuanxiao Xiao, Volker Wolfgang Blum, David Brian Mitzi
  • Multiple safety element torque limiter
    Patent number: 8162246
    Abstract: A displaceable drive ball safety element type torque limiter is installed in a variable speed AC motor drive crusher mill drive which can include a selective operable locking brake to hold the crusher components stationary during maintenance operations.
    Type: Grant
    Filed: March 3, 2010
    Date of Patent: April 24, 2012
    Inventors: Randall Long, Joseph C. Blum, Thomas F. Long, Mark W. Rudolph
  • Multiple safety element torque limiter
    Patent number: RE45889
    Abstract: A displaceable drive ball safety element type torque limiter is installed in a variable speed AC motor drive crusher mill drive which can include a selective operable locking brake to hold the crusher components stationary during maintenance operations.
    Type: Grant
    Filed: April 24, 2014
    Date of Patent: February 16, 2016
    Inventors: Randall Long, Joseph C. Blum, Thomas F. Long, Jr., Mark Wayne Rudolph