US5082826A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silver coated superconducting ceramic powder
Assignee: United States Department of the Navy
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Filing: 1990-08-02
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Granted: 1992-01-21
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Expires: 2010-08-02
Abstract
Abstract A silver coated superconducting ceramic powder made by (1) coating the superconducting ceramic powder particles with AgNO 3 ; (2) melting the AgNO 3 so that it wets and forms a uniform coating over the surfaces of the particles; and (3) decomposing the AgNO 3 to form a thin, uniform coating of silver metal on the surfaces of the particles. The product is a loose powder of superconducting ceramic particels which are uniformly coated with a thin layer of silver metal. The powder can be cold worked (e.g., swaged, forged, etc.) to form superconducting structures such as rods or wires.
Inventors
- 👤 William A. Ferrando
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:18
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/80; C04B41/81; C04B41/85; C04B41/88; B; B22; B22F; B22F1/00; B22F1/18; B22F5/00; B22F5/12; C04B35/00; C04B35/01; C04B35/45; C04B35/4504; C04B35/4508; C04B41/45; C04B41/4584; C04B41/50; C04B41/51; C04B41/5116; H; H10; H10N; H10N60/00; H10N60/01; H10N60/0268; B22F2998/00; C04B2235/00; C04B2235/02; C04B2235/30; C04B2235/32; C04B2235/3205; C04B2235/3215; C04B2235/3224; C04B2235/3225; Y; Y10; Y10S; Y10S505/00; Y10S505/775; Y10S505/776; Y10S505/779; Y10S505/78; Y10S505/781; Y10S505/785; Y10S505/80; Y10S505/801; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2993
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
70 words
A silver metal coated superconducting ceramic powder wherein the superconducting ceramic particles are each coated with a uniform layer of silver metal which is from about 0.02 to about 10 microns thick, wherein the silver metal comprises from about 1 to about 25 weight percent of the silver-coated superconducting ceramic powder with the superconducting ceramic material comprising the remainder, and wherein the silver-coated superconducting ceramic powder is a loose powder.
Claim 2
Dependent Claim
70 words
A silver metal coated superconducting ceramic powder wherein the superconducting ceramic particles are each coated with a uniform layer of silver metal which is from about 0.02 to about 10 microns thick, wherein the silver metal comprises from about 1 to about 25 weight percent of the silver-coated superconducting ceramic powder with the superconducting ceramic material comprising the remainder, and wherein the silver-coated superconducting ceramic powder is a loose powder.
Claim 3
Dependent Claim
20 words
The silver metal coated superconducting ceramic powder of claim 1 wherein the ceramic material is a yttrium based ceramic superconductor.
Claim 4
Dependent Claim
24 words
The silver metal coated superconducting ceramic powder of claim 2 wherein the uniform layer of silver metal is from 0.05 ti 1 micron thick.
Claim 5
Dependent Claim
22 words
The silver metal coated superconducting ceramic powder of claim 2 wherein the ceramic material is YBa 2 Cu 3 O 7-x .
Claim 6
Dependent Claim
24 words
The silver metal coated superconducting ceramic powder of claim 4 wherein the uniform layer of silver metal is from 0.05 to 1 micron thick.
Claim 7
Dependent Claim
20 words
The silver metal coated superconducting ceramic powder of claim 1 wherein the ceramic material is a bismuth based ceramic superconductor.
Claim 8
Dependent Claim
24 words
The silver metal coated superconducting ceramic powder of claim 6 wherein the uniform layer of silver metal is from 0.5 to 1 micron thick.
Claim 9
Dependent Claim
27 words
The silver metal coated superconducting ceramic powder of claim 6 wherein the ceramic material is Bi 0 .7 Pb 0 .3 SrCaCu 1 .8 O x .
Claim 10
Dependent Claim
24 words
The silver metal coated superconducting ceramic powder of claim 8 wherein the uniform layer of silver metal is from 0.05 to 1 micron thick.
Claim 11
Dependent Claim
20 words
The silver metal coated superconducting ceramic powder of claim 1 wherein the ceramic material is a thallium based ceramic superconductor.
Claim 12
Dependent Claim
24 words
The silver metal coated superconducting ceramic powder of claim 10 wherein the uniform layer of silver metal is from 0.05 to 1 micron thick.
Claim 13
Dependent Claim
25 words
The silver metal superconducting ceramic powder of claim 10 wherein the ceramic material is Tl 2 Ba 2 Ca 2 Cu 3 O 7-x .
Claim 14
Dependent Claim
24 words
The silver metal coated superconducting ceramic powder of claim 12 wherein the uniform layer of silver metal is from 0.05 to 1 micron thick.
Claim 15
Dependent Claim
37 words
The silver metal coated superconducting ceramic powder of claim 1 wherein the silver metal comprises from 1 to 15 weight percent of the silver metal coated superconducting ceramic powder with the superconducting ceramic material comprising the remainder.
Claim 16
Dependent Claim
37 words
The silver metal coated superconducting ceramic powder of claim 14 wherein the silver metal comprises from 10 to 15 weight percent of the silver metal coated superconducting ceramic powder with the superconducting ceramic material comprising the remainder.
Claim 17
Dependent Claim
37 words
The silver metal coated superconducting ceramic powder of claim 2 wherein the silver metal comprises from 1 to 15 weight percent of the silver metal coated superconducting ceramic powder with the superconducting ceramic material comprising the remainder.
Claim 18
Dependent Claim
37 words
The silver metal coated superconducting ceramic powder of claim 16 wherein the silver metal comprises from 10 to 15 weight percent of the silver metal coated superconducting ceramic powder with the superconducting ceramic material comprising the remainder.
Claim 19
Dependent Claim
37 words
The silver metal coated superconducting ceramic powder of claim 6 wherein the silver metal comprises from 1 to 15 weight percent of the silver metal coated superconducting ceramic powder with the superconducting ceramic material comprising the remainder.
Claim 20
Dependent Claim
37 words
The silver metal coated superconducting ceramic powder of claim 18 wherein the silver metal comprises from 10 to 15 weight percent of the silver metal coated superconducting ceramic powder with the superconducting ceramic material comprising the remainder.
Claim 21
Dependent Claim
37 words
The silver metal coated superconducting ceramic powder of claim 10 wherein the silver metal comprises from 1 to 15 weight percent of the silver metal coated superconducting ceramic powder with the superconducting ceramic material comprising the remainder.
Claim 22
Dependent Claim
37 words
The silver metal coated superconducting ceramic powder of claim 20 wherein the silver metal comprises from 10 to 15 weight percent of the silver metal coated superconducting ceramic powder with the superconducting ceramic material comprising the remainder.
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) | 1995-01-20 | 1995-07-22 | 1996-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-01-20 | 1999-07-22 | 2000-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-01-20 | 2003-07-22 | 2004-01-21 | $7700.00 | Window Closed / Lapsed |