US5061313A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Direct alloy synthesis from heteropolymetallic precursors
Assignee: Northeastern University
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Filing: 1990-09-07
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Granted: 1991-10-29
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Expires: 2010-09-07
Abstract
Abstract A method for forming a single-phase, homogeneous and high surface area metal alloy by reducing a heteropolymetallic complex in the presence of H 2 at a low temperature. Also disclosed is a method for forming a single-phase, homogeneous and high surface area metal alloy by thermolysis of a heteropolymetallic complex in an inert atmosphere at a low temperature.
Inventors
- 👤 Geoffrey Davies
- 👤 Hui-Li Shao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:05
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/74; B01J23/755; B22; B22F; B22F9/00; B22F9/16; B22F9/18; B22F9/24; B22F9/26; B22F9/30; C; C22; C22B; C22B5/00; C22B5/02; C22B5/12
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
65 words
A method of making a substantially single-phase and homogeneous metal alloy of large surface area at low temperature, comprising the steps of heating a heteropolymetallic complex (formed by transmetalation and) comprising copper and nickel, in an inert atmosphere, to a temperature which causes reductive decomposition of said heteropolymetallic complex; and maintaining said temperature for a time sufficient to convert said heteropolymetallic complex into an alloy.
Claim 2
Independent Claim
65 words
A method of making a substantially single-phase and homogeneous metal alloy of large surface area at low temperature, comprising the steps of heating a heteropolymetallic complex (formed by transmetalation and) comprising copper and nickel, in an inert atmosphere, to a temperature which causes reductive decomposition of said heteropolymetallic complex; and maintaining said temperature for a time sufficient to convert said heteropolymetallic complex into an alloy.
Claim 3
Dependent Claim
13 words
The method of claim 1 wherein said inert atmosphere is an argon atmosphere.
Claim 4
Dependent Claim
21 words
The method of claim 1 wherein the atomic ratio of copper to nickel in said heteropolymetallic complex is three to one.
Claim 5
Dependent Claim
21 words
The method of claim 1 wherein the atomic ratio of copper to nickel in said heteropolymetallic complex is one to one.
Claim 6
Dependent Claim
21 words
The method of claim 1 wherein the atomic ratio of copper to nickel in said heteropolymetallic complex is one to three.
Claim 7
Dependent Claim
30 words
The method of claim 1 wherein said heteropolymetallic complex has the chemical formula: (μ.sub.4 -0)N.sub.4 Cu.sub.4-x (Ni(H.sub.2 O)).sub.x Cl.sub.6 where N is N-diethylnicotinamide and x is 1, 2, or 3.
Claim 8
Dependent Claim
13 words
The method of claim 1 wherein said temperature ranges from about 150-450° C.
Claim 9
Dependent Claim
13 words
The method of claim 1 wherein said temperature ranges from about 250-450° C.
Claim 10
Dependent Claim
12 words
The method of claim 1 wherein said temperature is about 350° C.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-10-28 | 1995-04-29 | 1995-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-10-28 | 1999-04-29 | 1999-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-10-28 | 2003-04-29 | 2003-10-29 | $7700.00 | Window Closed / Lapsed |