Patents by Inventor John F. Lindsley

John F. Lindsley 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).

  • Catalyst for hydroconversion of heavy oils and method of making the catalyst
    Patent number: 4652545
    Abstract: Catalysts for hydroconversion of heavy oils, particularly those containing Ramsbottom carbon precursors, comprise nickel or cobalt and molybdenum on porous alumina containing 1-3% silica. The catalysts have total pore volume of 0.5 to 1.5 ml/gm with at least 70% of the pore volume in pores of 40-60.ANG. pore radius and with only about 10-35% of the nickel or cobalt in acid extractable form.
    Type: Grant
    Filed: May 6, 1985
    Date of Patent: March 24, 1987
    Assignee: American Cyanamid Company
    Inventors: John F. Lindsley, Marvin S. Goldstein, William H. Quayle
  • Hydrotreating catalyst support having dual pore structure
    Patent number: 4465789
    Abstract: Hydrotreating catalysts are made on supports having a core of alumina having predominantly micropore structure, surrounded by a rind of different alumina having at least 25% of total pore volume in macropores. The catalyst support material is impregnated with catalytic metals, e.g. molybdenum with cobalt or nickel or both. The rind captures metals removed from the oils being treated to prevent deactivation of the core by such metals.
    Type: Grant
    Filed: April 4, 1983
    Date of Patent: August 14, 1984
    Assignee: American Cyanamid Company
    Inventor: John F. Lindsley
  • Process for producing rare earth exchanged crystalline aluminosilicate
    Patent number: 4125591
    Abstract: A process for preparing rare earth exchanged zeolite X and zeolite Y having improved activity and stability. The process of this invention involves partially exchanging sodium forms of zeolite X and zeolite Y with a solution of rare earth ions; calcining the partially exchanged zeolites; and further exchanging the calcined partially exchanged zeolites to replace remaining alkali metal ions.
    Type: Grant
    Filed: December 13, 1973
    Date of Patent: November 14, 1978
    Assignee: American Cyanamid Company
    Inventor: John F. Lindsley