Patents by Inventor Arthur William Sleight

Arthur William Sleight 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).

  • Superconducting bismuth-strontium-calcium-copper oxide compositions and process for manufacture
    Patent number: 6855670
    Abstract: Compositions having the nominal formula BiaSrbCacCu3Ox wherein a is from about 1 to 3, b is from about ? to 4, c is from about {fraction (3/16)} to 2, x=(1.5 a+b+c+y) where y is from about 2 to 5, with the proviso that “b+c” is from about {fraction (3/2)} to 5, containing a metal oxide phase of the formula Bi2Sr3?zCazCu2O8+w wherein z is from about 0.1 to 0.9 w is greater than zero but less than 1, are superconducting. Processes for manufacturing such compositions and for using them are disclosed.
    Type: Grant
    Filed: May 24, 1990
    Date of Patent: February 15, 2005
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Jagannatha Gopalakrishnan, Arthur William Sleight, Munirpallam Appadorai Subramanian
  • Catalyst regeneration with impregnation of bismuth and molybdenum
    Patent number: 4052332
    Abstract: Process for regenerating a spent catalyst, which catalyst contains potassium, cobalt, nickel, iron, bismuth, phosphorus and molybdenum and sufficient oxygen to satisfy the valence of the other elements therein, on a support, e.g. silicon oxide, wherein at least a portion of the molybdenum has been lost during ammoxidation, comprising impregnating said catalyst with bismuth and molybdenum in solution so that at least some of the molybdenum lost is replaced, e.g., a typical impregnating solution is prepared by dissolving molybdenum trioxide and phosphoric acid in water, adding nitric acid and finally dissolving bismuth nitrate pentahydrate in the resultant solution.
    Type: Grant
    Filed: April 20, 1976
    Date of Patent: October 4, 1977
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Michael Brian D'Amore, Arthur William Sleight
  • Rhenium oxides of types MReO.sub.4 and M'.sub.2 ReO.sub.6
    Patent number: 4027004
    Abstract: Novel rhenium oxides of the formulas MReO.sub.4 and M'.sub.2 ReO.sub.6, where M is Mg, Zn, Mn, Al, Ga, Fe, Co, or Ni and M' is Cr or Fe, are prepared by heating powder mixtures containing precursor oxides with or without some of the metals selected to give the proper stoichiometry, under a pressure of at least 25 kbars. The new oxides are useful in electrical elements, e.g., resistors.
    Type: Grant
    Filed: May 10, 1976
    Date of Patent: May 31, 1977
    Assignee: E. I. Du Pont de Nemours & Company
    Inventor: Arthur William Sleight
  • Ternary oxides with the cubic KSbO.sub.3 crystal structure
    Patent number: 3954956
    Abstract: Ternary oxides characterized by single phase cubic KSbO.sub.3 -type crystal structure are electrically conductive and useful as pyrotechnics. BaIr.sub.2 O.sub.6 is exemplary.
    Type: Grant
    Filed: January 31, 1975
    Date of Patent: May 4, 1976
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Arthur William Sleight