Patents by Inventor Harry P. Leftin

Harry P. Leftin 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).

  • Supplemental ammonia synthesis
    Patent number: 4568532
    Abstract: Ammonia synthesis gas is partially converted over iron-based synthesis catalyst, cooled, and further converted over a more active synthesis catalyst.
    Type: Grant
    Filed: October 16, 1984
    Date of Patent: February 4, 1986
    Assignee: The M. W. Kellogg Company
    Inventors: Gereld S. Benner, Joseph R. Le Blanc, Jing M. Lee, Harry P. Leftin, Philip J. Shires, Christiaan P. van Dijk
  • Steam reforming catalyst
    Patent number: 4539310
    Abstract: Hydrocarbon feedstocks including those containing sulfur are steam reformed in the presence of a catalyst which in the unreduced condition contains nickel oxide, rare earth metal oxide, and zirconium oxide.
    Type: Grant
    Filed: May 30, 1984
    Date of Patent: September 3, 1985
    Assignee: The M. W. Kellogg Company
    Inventors: Harry P. Leftin, Kashinath Z. Patil
  • Pyrolysis coke inhibition
    Patent number: 4176045
    Abstract: In the production of lower olefins by steam cracking normally liquid hydrocarbons at very short residence times, the formation of coke deposits in cracking furnace tubes is minimized by the addition of a low-coking hydrocarbon to fresh feed having a high coking tendency.
    Type: Grant
    Filed: July 10, 1978
    Date of Patent: November 27, 1979
    Assignee: Pullman Incorporated
    Inventors: Harry P. Leftin, David S. Newsome