US5036044A
Expired / Lapsed
US
⏱️ 0.0 years remaining
R-Tl-Sr-Ca-Cu-O superconductors
Assignee: University of Arkansas at Fayetteville
•
Filing: 1988-09-29
•
Granted: 1991-07-30
•
Expires: 2008-09-29
Abstract
Abstract A high temperature superconductor system is provided having the following formula: M-A-B-C-D-E, wherein, M is a metallic element, A is an element in Group 3A, B is an element in Group 2A, C is another element in Group 2A, D is an element in Group 1B, and E is an element in Group 6A. In an embodiment, the high temperature superconductor has the following formula: R-Tl-Sr-Ca-Cu-O (wherein R is chosen from the group consisting of La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, and Y). Processes for making these high temperature superconductors are also disclosed.
Inventors
- 👤 Allen M. Hermann
- 👤 Zhengzhi Sheng
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 23:27
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/45; C04B35/4512; C04B35/4504; H; H10; H10N; H10N60/00; H10N60/80; H10N60/85; H10N60/855; H10N60/857; Y; Y10; Y10S; Y10S505/00; Y10S505/775; Y10S505/776; Y10S505/783
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
33 words
A composition having superconductive properties the composition comprising a melt produced complex having the nominal formula: R-Tl-Sr-Ca-Cu-O wherein R is a rare earth metal, and the atomic molar ratio of R:Tl:Sr:Ca:CU is 1:2:2:2:3.
Claim 2
Dependent Claim
33 words
A composition having superconductive properties the composition comprising a melt produced complex having the nominal formula: R-Tl-Sr-Ca-Cu-O wherein R is a rare earth metal, and the atomic molar ratio of R:Tl:Sr:Ca:CU is 1:2:2:2:3.
Claim 3
Dependent Claim
24 words
A composition having superconductive comprising a melt produced complex having the following nominal formula: Pr-Tl-Sr-Ca-Cu-O wherein the atomic molar ratio of Pr:Tl:Sr:Ca:Cu is 1:2:2:2:3.
Claim 4
Dependent Claim
24 words
A composition having superconductive comprising a melt produced complex having the following nominal formula: Pr-Tl-Sr-Ca-Cu-O wherein the atomic molar ratio of Pr:Tl:Sr:Ca:Cu is 1:2:2:2:3.
Claim 5
Dependent Claim
24 words
A composition having superconductive properties comprising a melt produced complex having the nominal formula: Tb-Tl-Sr-Ca-Cu-O wherein the atomic molar ratio of Tb-Tl-Sr-Ca-Cu is 1:2:2:2:3.
Claim 6
Dependent Claim
24 words
A composition having superconductive properties comprising a melt produced complex having the nominal formula: Tb-Tl-Sr-Ca-Cu-O wherein the atomic molar ratio of Tb-Tl-Sr-Ca-Cu is 1:2:2:2:3.
Claim 7
Dependent Claim
45 words
A composition having superconductive properties comprising a melt produced complex having the following nominal approximate stoichiometry: RTl.sub.2 Sr.sub.2 Ca.sub.2 Cu.sub.3 O.sub.7 wherein R is chosen from the group consisting of La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, and Y.
Claim 8
Dependent Claim
45 words
A composition having superconductive properties comprising a melt produced complex having the following nominal approximate stoichiometry: RTl.sub.2 Sr.sub.2 Ca.sub.2 Cu.sub.3 O.sub.7 wherein R is chosen from the group consisting of La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, and Y.
Claim 9
Dependent Claim
21 words
A composition having superconductive properties comprising a melt produced complex having the following nominal approximate stoichiometry: PrTl.sub.2 Sr.sub.2 Ca.sub.2 Cu.sub.3 O.sub.7.
Claim 10
Dependent Claim
21 words
A composition having superconductive properties comprising a melt produced complex having the following nominal approximate stoichiometry: PrTl.sub.2 Sr.sub.2 Ca.sub.2 Cu.sub.3 O.sub.7.
Claim 11
Dependent Claim
21 words
A composition having superconductive properties comprising a melt produced complex having the following nominal approximately stoichiometry: TbTl.sub.2 Sr.sub.2 Ca.sub.2 Cu.sub.3 O.sub.7.
Claim 12
Dependent Claim
21 words
A composition having superconductive properties comprising a melt produced complex having the following nominal approximately stoichiometry: TbTl.sub.2 Sr.sub.2 Ca.sub.2 Cu.sub.3 O.sub.7.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-07-29 | 1995-01-28 | 1995-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-29 | 1999-01-28 | 1999-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-29 | 2003-01-28 | 2003-07-30 | $7700.00 | Window Closed / Lapsed |