Patents by Inventor Robert R. Clarke

Robert R. Clarke 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).

  • Mitomycin derivatives having reduced bone marrow toxicity, processes for their preparation, and the uses thereof
    Patent number: 5091523
    Abstract: The invention relates to certain derivatives of mitomycins A and C and the use thereof to treat bacterial infections and to supress the growth of cancer cells. The invention also relates to processes for the preparation of the mitomycin derivatives of the invention.
    Type: Grant
    Filed: December 3, 1990
    Date of Patent: February 25, 1992
    Assignee: Georgetown University
    Inventors: Abdolhossen Talebian, Dianna Green, Charles Hammer, Philip Schein, Alem Ghiorghis, Robert R. Clarke
  • Ignition assembly for flare stacks
    Patent number: 4147498
    Abstract: An electrical ignition assembly for igniting flare gases and including at least a pair of spaced apart ignitor rods located adjacent the exit end of the stack, and an electrical control assembly for providing a spark across the pair of rods. The assembly may also be employed to light a flare stack pilot, if desired. In addition a pilot flame thermocouple and a stack flame thermocouple may be provided to monitor the system.
    Type: Grant
    Filed: January 13, 1977
    Date of Patent: April 3, 1979
    Assignee: Clarke, Inc.
    Inventor: Robert R. Clarke