US PATENT SUBCLASS 505 / 889
.~.~ Utilizing rare earth material

Current as of: June, 1999
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505 /   HD   SUPERCONDUCTOR TECHNOLOGY: APPARATUS, MATERIAL, PROCESS

825  DF  APPARATUS, PER SE, DEVICE, PER SE, OR PROCESS OF MAKING OR OPERATING SAME {36}
888  DF  .~ Refrigeration: (Class 62) {9}
889.~.~ Utilizing rare earth material

DEFINITION

Classification: 505/889

Utilizing rare earth material:

(under subclass 888) Subject matter wherein a material containing the chemical element Yttrium with atomic *number

39 or any of the group of chemical elements with atomic numbers 58 to 71 inclusive is used to remove heat.