Skip to main content

Full text of "USPTO Patents Application 08479810"

See other formats



IN THE UNITED STATES PATENT AND TRADEMARK OFFICE 



Applicants: J. Bednorz et al. 



Date: March 6, 1997 



Serial No.: 08/303,561 



Group Art Unit: 1105 



Filed: September 9, 1994 



Examiner: D. McGinty 



For: NEW SUPERCONDUCTIVE COMPOUNDS HAVING HIGH 

TRANSITION TEMPERATURE, AND METHODS FOR THEIR 
USE AND PREPARATION 

The Commissioner of Patents and Trademarks 
Washington, D.C. 



Sir: 

In response to the Office Letter dated January 8, 1997, please consider the 



Add claims 114-128. 

114. (Added) A method including the steps of forming copper oxide having a phase 
therein which exhibits a superconducting state at a critical temperature in excess of 
26°K; 

maintaining the temperature of said material at a temperature less than said critical 
temperature to produce said superconducting state in said phase; 

passing an electrical supercurrent through said copper oxide while it is in said 



SUBSTITUTE AMENDMENT 



following: 



IN THE CLAIMS 



YO987-074BY 



1 



Ser. No. 08/303,561 
superconducting state; 

said copper oxide includes at least one element selected from the group consisting of 
a Group II A element and at least one element selected from the group consisting of a 
rare earth element and a Group III B element. 

115. (Added) A method comprising the steps of: 

forming a composition including copper, oxygen and an element selected from the 
group consisting of at least one Group II A element and at least one element selected 
from the group consisting of a rare earth element and a Group III B element, where 
said composition is a mixed copper oxide having a non-stoichiometric amount of 
oxygen therein and exhibiting a superconducting state at a temperature greater than 
26°K; 

maintaining said composition in said superconducting state at a temperature greater 
than 26°K; and 

passing an electrical current through said composition while said composition is in said 
superconducting state. 

116. (Added) A method including the steps of: 

forming a composition exhibiting a superconductive state at a temperature in excess of 
26°K; 

maintaining said composition at a temperature in excess of 26°K at which temperature 



YO987-074BY 



2 




Ser. No. 08/303,561 

said composition exhibits said superconductive state; 

passing an electrical current through said composition while said composition is in said 
superconductive state; and 

said composition including a copper oxide and at least one element selected from the 
group consisting of Group II A element and at least one element selected from the 
group consisting of a rare earth element and a Group III B element. 

117. (Added) A superconductive method for causing electric-current flow in a 
superconductive state at a temperature in excess of 26°K, comprising: 

(a) providing a superconductor element made of a superconductive 
composition, the superconductive composition consisting essentially of a 
copper-oxide compound having a layer-type perovskite-like crystal 
structure, the composition having a superconductive transition 
temperature T c of greater than 26°K, said superconductive composition 
includes at least one element selected from the group consisting of a 
Group II A element and at least one element selected from the group 
consisting of a rare earth element and a Group III B element; 

(b) maintaining the superconductor element at a temperature above 
26°K and below the superconductor transition temperature 

T c of the superconductive composition; and 

(c) causing an electric current to flow in the superconductor element. 



YO987-074BY 



3 



Ser. No. 08/303,561 

118. (Added) A superconductive method for conducting an electric 
current essentially without resistive losses, comprising: 

(a) providing a superconductor element made of a superconductive 
composition, the superconductive composition consisting essentially of a 
copper-oxide compound having a layer-type perovskite-like crystal 
structure, the copper-oxide compound including at least one element 
selected from the group consisting of a group II A element and at least 
one element selected from the group consisting of a rare earth element 
and a Group III B element, the composition having a 
superconductive/resistive transition defining a 

superconductive/resistive-transition temperature range between an upper 
limit defined by a transition-onset temperature T c and a lower limit 
defined by an effectively-zero-bulk-resistivity intercept temperature 
T p=0 , the transition-onset temperature T c being greater than 26°K; 

(b) maintaining the superconductor element at a temperature below the 
effectively-zero-bulk-resistivity intercept temperature T p=0 of the 
superconductive composition; and 

(c) causing an electric current to flow in the superconductor element. 

119. (Added) A method including the steps of forming a transition metal oxide having 
a phase therein which exhibits a superconducting state at a critical temperature in 
excess of 26°K; 

maintaining the temperature of said material at a temperature less than said critical 



YO987-074BY 



4 



Ser. No. 08/303,561 

temperature to produce said superconducting state in said phase; 

passing an electrical supercurrent through said copper oxide while it is in said 
superconducting state; 

said transitional metal oxide includes at least one element selected from the group 
consisting of a Group II A element and at least one element selected from the group 
consisting of a rare earth element and a Group III B element. 

1 20. (Added) A method comprising the steps of: 

forming a composition including a transition metal, oxygen and an element selected 
from the group consisting of at least one Group II A element and at least one element 
selected from the group consisting of a rare earth element and a Group III B element, 
where said composition is a mixed transitional metal oxide having a non-stoichiometric 
amount of oxygen therein and exhibiting a superconducting state at a temperature 
greater than 26°K; 

maintaining said composition in said superconducting state at a temperature greater 
than 26°K; and 

passing an electrical current through said composition while said composition is in said 
superconducting state. 

121. (Added) A method including the steps of: 

forming a composition exhibiting a superconductive state at a temperature in excess of 



YO987-074BY 



5 




Ser. No. 08/303,561 
26°K; 

maintaining said composition at a temperature in excess of 26°K at which temperature 
said composition exhibits said superconductive state; 

passing an electrical current through said composition while said composition is in said 
superconductive state; and 

said composition including a transitional metal oxide and at least one element selected 
from the group consisting of Group II A element and at least one element selected 
from the group consisting of a rare earth element and a Group III B element. 

122. (Added) A superconductive method for causing electric-current flow in a 
superconductive state at a temperature in excess of 26°K, comprising: 

(a) providing a superconductor element made of a superconductive 
composition, the superconductive composition consisting essentially of a 
transition metal oxide compound having a layer-type perovskite-like 
crystal structure, the composition having a superconductive transition 
temperature T c of greater than 26°K, said superconductive composition 
includes at least one element selected from the group consisting of a 
Group II A element and at least one element selected from the group 
consisting of a rare earth element and a Group III B element; 

(b) maintaining the superconductor element at a temperature above 26°K 
and below the superconductor transition temperature T c of the 
superconductive composition; and 



YO987-074BY 



6 



Ser. No. 08/303,561 

(c) causing an electric current to flow in the superconductor element. 

123. (Added) A superconductive method for conducting an electric current essentially 
without resistive losses, comprising: 

(a) providing a superconductor element made of a superconductive 
composition, the superconductive composition consisting essentially of a 
transition metal-oxide compound having a layer-type perovskite-like 
crystal structure, the transition metal-oxide compound including at least 
one element selected from the group consisting of a Group II A element 
and at least one element selected from the group consisting of a rare 
earth element and a Group III B element, the composition having a 
superconductive/resistive transition defining a 

superconductive/resistive-transition temperature range between an upper 
limit defined by a transition-onset temperature T c and a lower limit 
defined by an effectively-zero-bulk-resistivity intercept temperature T p=0 , 
the transition-onset temperature T c being greater than 26°K; 

(b) maintaining the superconductor element at a temperature below the 
effectively-zero-bulk-resistivity intercept temperature T p=0 of the 
superconductive composition; and 

(c) causing an electric current to flow in the superconductor element. 

124. (Added) A method including the steps of forming copper oxide having a phase 
therein which exhibits a superconducting state at a critical temperature in excess of 
26°K; 



YO987-074BY 



7 




maintaining the temperature of said material at a temperature less than said critical 
temperature to produce said superconducting state in said phase; 

passing an electrical supercurrent through said copper oxide while it is in said 
superconducting state; 

said copper oxide includes at least one element selected from the group consisting of 
a Group II A element, at least one element selected from the group consisting of a 
rare earth element and at least one element selected from the group consisting of a 
Group III B element. 

125. (Added) A method comprising the steps of: 

forming a composition including copper, oxygen and any element selected from the 
group consisting of at least one Group II A element and at least one element selected 
from the group consisting of a rare earth element and at least one element selected 
from the group consisting of a Group III B element, where said composition is a mixed 
copper oxide having a non-stoichiometric amount of oxygen therein and exhibiting a 
superconducting state at a temperature greater than 26°K; 

maintaining said composition in said superconducting state at a temperature greater 
than 26°K; and 

passing an electrical current through said composition while said composition is in said 
superconducting state. 

126. (Added) A method including the steps of: 

forming a composition exhibiting a superconductive state at a temperature in excess of 



YO987-074BY 



8 




Ser. No. 08/303,561 
26°K; 

maintaining said composition at a temperature in excess of 26°K at which temperature 
said composition exhibits said superconductive state; 

passing an electrical current through said composition while said composition is in said 
superconductive state; and 

said composition including a copper oxide and at least one element selected from the 
group consisting of Group II A element, at least one element selected from the group 
consisting of a rare earth element and at least one element selected from the group 
consisting of a Group III B element. 

127. (Added) A superconductive method for causing electric-current flow in a 
superconductive state at a temperature in excess of 26°K, comprising: 

(a) providing a superconductor element made of a superconductive 
composition, the superconductive composition consisting essentially of a 
copper-oxide compound having a layer-type perovskite-like crystal 
structure, the composition having a superconductive transition 
temperature T c of greater than 26°K, said superconductive composition 
includes at least one element selected from the group consisting of a 
Group II A element, at least one element selected from the group 
consisting of a rare earth element and at least one element selected 
from the group consisting of a Group III B element; 

(b) maintaining the superconductor element at a temperature above 



YO987-074BY 



9 




Ser. No. 08/303,561 

26°K and below the superconductor transition temperature 
T c of the superconductive composition; and 

(c) causing an electric current to flow in the superconductor element. 

128. (Added) A superconductive method for conducting an electric 
current essentially without resistive losses, comprising: 

(a) providing a superconductor element made of a superconductive 
composition, the superconductive composition consisting essentially of a 
copper-oxide compound having a layer-type perovskite-like crystal 
structure, the copper-oxide compound including at least one element 
selected from the group consisting of a group II A element, at least one 
element selected from the group consisting of a rare earth element and 
at least one element selected from the group consisting of a Group III B 
element, the composition having a superconductive/resistive transition 
defining a superconductive/resistive-transition temperature range 
between an upper limit defined by a transition-onset temperature T c and 
a lower limit defined by an effectively-zero-bulk-resistivity intercept 
temperature 

T p=0 , the transition-onset temperature T c being greater than 26°K; 

(b) maintaining the superconductor element at a temperature below the 
effectively-zero-bulk-resistivity intercept temperature T p=0 of the 
superconductive composition; and 

(c) causing an electric current to flow in the superconductor element. 



YO987-074BY 



10