Patents by Inventor Jagannatha Gopalakrishnan

Jagannatha Gopalakrishnan 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
  • Process for manufacturing single phase Tl.sub.2 Ba.sub.2 CuO.sub.6-x superconductors
    Patent number: 5219833
    Abstract: Compositions containing a crystalline phase of the formula Tl.sub.2 Ba.sub.2 CuO.sub.6+x wherein x is from 0 to 0.5. Processes for manufacturing such compositions and for using them are disclosed.
    Type: Grant
    Filed: September 30, 1991
    Date of Patent: June 15, 1993
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Jagannatha Gopalakrishnan, Munirpallam A. Subramanian
  • Superconducting composition Tl.sub.2 Ba.sub.2 CuO.sub.6+x and process for manufacture
    Patent number: 4929594
    Abstract: Compositions containing a crystalline phase of the formula Tl.sub.2 Ba.sub.2 CuO.sub.6+x wherein x is from 0 to 0.5. Processes for manufacturing such compositions and for using them are disclosed.
    Type: Grant
    Filed: March 14, 1988
    Date of Patent: May 29, 1990
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Jagannatha Gopalakrishnan, Munirpallam A. Subramanian
  • Lanthanum: sodium copper superconducting metal oxide compositions and process for manufacture
    Patent number: 4835136
    Abstract: Compositions containing a phase having the formula LA.sub.2-x Na.sub.x CuOz wherein x is about 0.1 to about 0.3 and z is about 3.8 to about 4.2 are superconducting. Processes for manufacturing such compositions and for using them are disclosed.
    Type: Grant
    Filed: February 4, 1988
    Date of Patent: May 30, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Jagannatha Gopalakrishnan, Arthur W. Sleight, Munirpallam A. Subramanian