Appeal 2007-2236
Application 10/991,738
1 Mizuta describes a method of preparing a superconductive material.
2 Page 2:3.
3 Like Rupich's article, the Mizuta superconductor has a layer
4 corresponding to Rupich's layer 14.
5 The Mizuta layer comprises an oxide which can have the empirical
6 formula AB2Cu3O7+x, where x is a number greater than -1 but less that +1.
7 When the x is about -1, the empirical formula of Mizuta is close to that of
8 Rupich. Mizuta, page 3:40
9 "A" can be Y, La, Nd, Sm, Eu, Gd, Dy, Ho, Er, Yb, Lu or a mixture of
10 two more thereof. Mizuta, 3:43. These elements are rare earth metals.
11 "B" can be Ba, Sr, Ca or a mixture of two ore more thereof.
12 Mizuta 3:44. These elements are alkaline earth metals.
13 What surfaces from the description in Mizuta is that the Mizuta layer
14 comprises the same oxide, albeit made by a different process. We do not
15 know the critical current density of the Mizuta layers corresponding layer 14
16 of Rupich.
17 The Mizuta examples tell us a little about the properties made from
18 different rare earth metals.
19 Examples 1 and 2 describe films made from lanthanum (La) salts and
20 not yttrium (Y) salts. Critical temperatures are reported as (on set) of 30 K
21 and 27K and perfect superconductivity is reported as 10 K and 10 K.
22 Examples 3 through 17 describe films made from yttrium instead of
23 lanthanum. Critical temperatures are reported as (on set) ranging from a
24 high of 97 to a low of 30 and perfect superconductivity is reported from a
25 high 89 K to a low of 15 K:
10
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Last modified: September 9, 2013