Patents by Inventor William E. Pettit

William E. Pettit 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).

  • System for charging a battery electric vehicle or a plugin hybrid vehicle using a fuel cell
    Patent number: 11938835
    Abstract: A fuel cell system includes a fuel cell generator, a rechargeable energy storage circuit, an auxiliary load, a converter circuit, and a switch circuit. The fuel cell generator is operable to generate electrical power in a stack output signal. The auxiliary load is powered by the rechargeable energy storage circuit while in a first mode, and powered by a local signal while in a second mode. The converter circuit is operable to convert the stack output signal into a plurality of recharge signals while in the first mode and in the second mode, and convert the stack output signal into the local signal while in the second mode. The switch circuit is operable switch the plurality of recharge signals to one or more electric vehicles, and switch the local signal to the auxiliary load while in the second mode.
    Type: Grant
    Filed: August 24, 2021
    Date of Patent: March 26, 2024
    Assignee: GM Global Technology Operations LLC
    Inventors: Alan B. Martin, Matthew C. Kirklin, Margarita M. Mann, William H. Pettit, Charles E. Freese, V
  • 1,4-Bis(2-haloethyl)-1,4-diazabicyclo[2.2.1]-heptane dihydrogen dimaleate and selected salts
    Patent number: 4306071
    Abstract: 1,4-Bis(2'-haloethyl)-1,4-diazabicyclo[2.2.1]-heptane derivatives, such as diperchlorate, dichloride, diacetate, dibenzoate, diascorbate, disalicylate, ditartrate, disaccharin, dihydrogen dimaleate, together with ethyl sulfonate and periodate.
    Type: Grant
    Filed: November 14, 1979
    Date of Patent: December 15, 1981
    Assignee: The United States of America as represented by the Department of Health & Human Services
    Inventors: George R. Pettit, Donald P. Gieschen, William E. Pettit