Patent US4933003A successfully refreshed from Google Patents.
US4933003A
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Metal alloy formation by reduction of polyheterometallic complexes
Assignee: Northeastern University
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Filing: 1989-07-18
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Granted: 1990-06-12
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Expires: 2009-07-18
Abstract
Abstract A method for forming a single-phase, homogeneous and high surface area metal alloy by reducing a polyheterometallic complex at a low temperature in hydrogen-containing gas.
Inventors
- 👤 James V. Marzik
- 👤 Louis G. Carreiro
- 👤 Geoffrey Davies
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:26
CPC Classifications
C; C22; C22B; C22B5/00; C22B5/02; C22B5/12; B; B22; B22F; B22F9/00; B22F9/16; B22F9/30
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
73 words
A method of making single-phase and homogeneous metal alloys of large surface area at low temperature comprising the steps of: (a) subjecting a polyheterometallic complex which includes the metals copper and nickel and being formed by transmetallation to a hydrogen-containing gas; (b) heating said polyheterometallic complex to a temperature equal to or above its decomposition temperature; (c) and maintaining said temperature for a time sufficient to reduce said complex to a single-phase alloy.
Claim 2
Independent Claim
73 words
A method of making single-phase and homogeneous metal alloys of large surface area at low temperature comprising the steps of: (a) subjecting a polyheterometallic complex which includes the metals copper and nickel and being formed by transmetallation to a hydrogen-containing gas; (b) heating said polyheterometallic complex to a temperature equal to or above its decomposition temperature; (c) and maintaining said temperature for a time sufficient to reduce said complex to a single-phase alloy.
Claim 3
Dependent Claim
22 words
The method defined in claim 1 wherein the atomic ratio of copper to nickel in said polyheterometallic complex is three to one.
Claim 4
Dependent Claim
23 words
The method defined in claim 2 wherein said polyheterometallic complex has the chemical formula: (μ.sub.4 -0)N.sub.4 Cu.sub.3 NiCl.sub.6.H.sub.2 O where N is N,N-diethylnicotinamide.
Claim 5
Dependent Claim
19 words
The method of claim 3 wherein said polyheterometallic complex is heated to a temperature of about 370 degrees centigrade.
References Cited (Backward Citations)
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Cited
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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) | 1993-06-11 | 1993-12-11 | 1994-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-11 | 1997-12-11 | 1998-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-11 | 2001-12-11 | 2002-06-12 | $7700.00 | Window Closed / Lapsed |