US PATENT SUBCLASS 505 / 779
.~.~ Other rare earth (i.e., Sc,Y,Ce,Pr,Nd,Pm,Sm,Eu,Gd,Tb,Dy,Ho,Er,Tm,Yb,Lu) and alkaline earth (i.e., Ca,Sr,Ba,Ra)

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505 /   HD   SUPERCONDUCTOR TECHNOLOGY: APPARATUS, MATERIAL, PROCESS

775  DF  HIGH Tc (ABOVE 30 K) SUPERCONDUCTING MATERIAL {3}
776  DF  .~ Containing transition metal oxide with rare earth or alkaline earth {4}
779.~.~ Other rare earth (i.e., Sc,Y,Ce,Pr,Nd,Pm,Sm,Eu,Gd,Tb,Dy,Ho,Er,Tm,Yb,Lu) and alkaline earth (i.e., Ca,Sr,Ba,Ra) {1}
780  DF  .~.~.~> Yttrium(Y) and barium(Ba)-(e.g., YBa2Cu307) {1}

DEFINITION

Classification: 505/779

Other rare earth (i.e., Sc, Y, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu) and alkaline earth (i.e., Ca, Sr, Ba, Ra):

(under subclass 776) Material containing another Rare Earth i.e., Scandium (Sc), Yttrium (Y), Cerium (Ce), Praseodymium (Pr), Neodymium (Nd), Promethium (Pm), Samarium (Sm), Europium (Eu), Gadoinium (Gd), Terbium (Tb), Dysprosium (Dy), Holmium (Ho), Erbium (Er), Thulium (Tm), Ytterbium (Yb) and Lutetium (Lu) and Alkaline Earth i.e., Calcium (Ca), Strontium (Sr), Barium (Ba) or Radium (Ra) but not any Lanthanum (La).