US PATENT SUBCLASS 505 / 896
.~.~ Special refrigerant compound

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}
896.~.~ Special refrigerant compound

DEFINITION

Classification: 505/896

Special refrigerant compound:

(under subclass 888) Subject matter wherein a particular unusual material consisting of atoms or ions of two or more different chemical elements in definite proportions and generally having properties unlike its constituent chemical elements is utilized for removing heat.