Appeal No. 94-2527
Application 07/816,715
preparing a powdered mixture of a glass having a vitreous transition temperature
T of less than 750EK and of superconducting oxide crystallites selected from the group
g
consisting of YBa Cu O compounds, compounds containing Tl Ba Cu O , compounds2 3 7 2 2 3 10
containing Bi Sr CaCu O and Bi Sr Ca Cu O , the percentage of the glass volume238
2 2 2 2 2 2 3 10
being in the range of 2% to 40%;
uniaxially compressing said powdered mixture at a temperature of between Tg
and T , wherein T is the glass-crystallization temperature, said compression producingx x
orientation of said superconducting oxide crystallites;
and furthermore subjecting the resulting composite material to an additional
stretching or rolling operation at a temperature between T and T , to thereby provideg x
shaping of the composite material.
The following references are relied upon by the examiner as evidence of
obviousness:
Omori et al. (Omori)
(Japanese ‘764) JP63-310,764 Dec. 19, 1988
JP01-103,934 (Japanese ‘934), Patent Abstract, vol. 13, no. 326 (July 24, 1989)
JP01-219,058 (Japanese ‘058), Patent Abstract, vol. 13, no. 326, (Sep. 1, 1989)
Yoshitake et al. (Yoshitake), “Preparation of Thin Films by Coevaporation and Phase
Identification in Bi-Sr-Ca-Cu-O System,” Jpn. J. Appl. Phys., vol. 27, no. 6, pp. L1089-
91 (June 1988)
Masuda et al. (Masuda), “Glass-Former-Doped Superconductors,” Jpn. J. Appl. Phys.
Lett., vol. 27, no. 8, pp. L1417-19 (Aug. 1988)
Qui et al. (Qui), “Some Properties of Bulk Y-Ba-Cu-O Compounds Containing SiO ,”
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J. Appl. Phys., vol. 64, no. 4, pp. 2234-36 (Aug. 15, 1988)
Claims 11 and 12 are rejected under 35 U.S.C. § 103 as being obvious over Qui
or Masuda in view of Japanese ‘764 and Japanese ‘058.
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