Dennis James Kountz

US Patent:

51383268, Aug 11, 1992

Filed:

Jul 27, 1990

Appl. No.:

7/476405

Inventors:

Donald Edwards - Wilmington DE
Raymond Tietz - Wilmington DE
Dennis J. Kountz - Wilmington DE
Jeffrey D. Cohen - Wilmington DE
Alan G. A. M. Armstrong - Oxon, GB2
Ian L. McDougall - Oxon, GB2

Assignee:

Oxford Medical Limited - Oxford
E. I. Du Pont de Nemours & Company - Wilmington DE

International Classification:

G01V 300
H01F 100

US Classification:

324319

Abstract:

A magnetic field generating assembly including self-contained modules formed from relatively high temperature superconducting material. A magnetic flux guide, such as a yoke, is positioned relative to the modules so that magnetic flux generated by the modules is coupled into the flux guide.

US Patent:

53428285, Aug 30, 1994

Filed:

Jan 29, 1993

Appl. No.:

8/027737

Inventors:

Dennis J. Kountz - Wilmington DE
Frank M. Pellicone - North East MD

Assignee:

E. I. Du Pont de Nemours and Company - Wilmington DE

International Classification:

B32B 900

US Classification:

505238

Abstract:

A superconducting Tl--Pb--Sr--Ca--Cu--O thin film comprised of at least one phase of the formula Tl. sub. 5 Pb. sub. 5 Sr. sub. 2 Ca. sub. 1+n Cu. sub. 2+n O. sub. 7+2n where n=0, 1 or 2 is disclosed, which is prepared by a process comprising sputtering an oxide film onto a dielectric substrate from an oxide target containing preselected amounts of Tl, Pb, Sr, Ca and Cu, and heating an oxygen-containing atmosphere in the deposited film in the presence of a source of thallium oxide and lead oxide and cooling the film.

US Patent:

52602516, Nov 9, 1993

Filed:

Jun 6, 1991

Appl. No.:

7/710888

Inventors:

Dennis J. Kountz - Wilmington DE
Frank M. Pellicone - North East MD

Assignee:

E. I. Du Pont de Nemours and Company - Wilmington DE

International Classification:

B05D 512

US Classification:

505 1

Abstract:

A process for making a superconducting Tl--Pb--Sr--Ca--Cu--O thin film comprised of at least one phase of the formula Tl. sub. 5 Pb. sub. 5 Sr. sub. 2 Ca. sub. 1+n Cu. sub. 2+n O. sub. 7+2n where n=0, 1 or 2. The process comprises sputtering an oxide film onto a dielectric substrate from an oxide target containing preselected amounts of Tl, Pb, Sr, Ca and Cu, and heating an oxygen-containing atmosphere in the deposited film in the presence of a source of thallium oxide and lead oxide and cooling the film.