US4940596A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for metal fibers
Assignee: 3M Co
•
Filing: 1988-11-16
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Granted: 1990-07-10
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Expires: 2008-11-16
Abstract
Abstract A slurry comprises a ferromagnetic fiber having an aspect ratio of 10 to 10,000 and an organic liquid medium that is unreactive with the metal fibers. The metal fibers are provided by preparing a mixture comprising a thermally unstable metal complex compound, comprising at least one ferromagnetic metal, in a liquid medium, applying energy to said mixture in the presence of an externally applied magnetic field to decompose said complex compound, and isolating the deposited metal fibers. Articles are provided by the impregnation of metal fibers of the invention into and onto a porous substrate.
Inventors
- 👤 Robin E. Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:42
CPC Classifications
B; B22; B22F; B22F9/00; B22F9/16; B22F9/30; B22F1/00; B22F1/06; B22F1/062; G; G11; G11B; G11B5/00; G11B5/62; G11B5/68; G11B5/70; G11B5/714; H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/032; H01F1/04; H01F1/06; H01F1/08; H01F1/44; H01F1/442; H01Q; H01Q17/00; H01Q17/002; Y; Y10; Y10S; Y10S75/00; Y10S75/952
Claims Analysis
Total Claims: 35
Claim 1
Independent Claim
96 words
A process comprising the steps: (a) preparing a mixture comprising a labile ligand stabilized zerovalent metal complex wherein said complex comprises at least one ferromagnetic metal and at least one ligand selected from the group consisting of unsaturated aliphatic compounds, aromatic compounds, and organic solvents, all of which are capable of forming labile solvated zerovalent metal complexes, and an organic liquid medium, and (b) applying energy to said mixture in the presence of an externally applied magnetic field to decompose said complex and provide a slurry of ferromagnetic metal fibers dispersed in said organic liquid medium.
Claim 2
Dependent Claim
96 words
A process comprising the steps: (a) preparing a mixture comprising a labile ligand stabilized zerovalent metal complex wherein said complex comprises at least one ferromagnetic metal and at least one ligand selected from the group consisting of unsaturated aliphatic compounds, aromatic compounds, and organic solvents, all of which are capable of forming labile solvated zerovalent metal complexes, and an organic liquid medium, and (b) applying energy to said mixture in the presence of an externally applied magnetic field to decompose said complex and provide a slurry of ferromagnetic metal fibers dispersed in said organic liquid medium.
Claim 3
Dependent Claim
28 words
The process according to claim 1 wherein said mixture further comprises 1 to 10 additional ligand stabilized zerovalent metal complexes wherein the metal is ferromagnetic or non ferromagnetic.
Claim 4
Dependent Claim
26 words
The process according to claim 2 wherein said mixture comprises 10 to 100 weight percent ferromagnetic metal compared to the total metal content of said mixture.
Claim 5
Dependent Claim
17 words
The process according to claim 3 wherein said mixture comprises 25 to 100 weight percent ferromagnetic metal.
Claim 6
Dependent Claim
30 words
The process according to claim 1 wherein said complex is prepared by reaction of at least one metal and an arene in a liquid medium in a metal atom reactor.
Claim 7
Dependent Claim
18 words
The process according to claim 1 wherein said complex is bis(toluene)iron(0), bis(toluene)cobalt(0), bis(xylene)iron(0), bis(toluene)nickel(0), or a combination thereof.
Claim 8
Dependent Claim
19 words
The process according to claim 1 wherein said liquid medium is an aromatic compound or an unsaturated aliphatic compound.
Claim 9
Dependent Claim
15 words
The process according to claim 1 further comprising the step of passivating said metal fibers.
Claim 10
Dependent Claim
15 words
The process according to claim 1 wherein step (b) takes place in a static mode.
Claim 11
Dependent Claim
15 words
The process according to claim 1 wherein step (b) takes place in a flow mode.
Claim 12
Dependent Claim
19 words
The process according to claim 1 further comprising the step of isolating said ferromagnetic metal fibers from said slurry.
Claim 13
Dependent Claim
28 words
The process according to claim 1 wherein said zerovalent metal complex is bis(toluene)iron(0), bis(toluene)cobalt(0), bis(xylene)iron(0), bis(toluene)nickel (0), bis(mesitylene)cobalt(0), bis(benzene)nickel(0), bis(naphthalene)iron(0), bis(xylene)cobalt(0), bis(benzene)iron(0), bis(α,α,α-trifluorotoluene)iron(0), bis(cyclopentadienyl)(μ-cyclopentadienyl)manganese)iron, bis(cyclopentadienyl)(μ-cyclooctatetraene)dicobalt, or combinations thereof.
Claim 14
Dependent Claim
18 words
The process according to claim 11 further comprising the step of incorporating said fibers into a resinous material.
Claim 15
Dependent Claim
14 words
The process according to claim 1 wherein said ferromagnetic metal fibers are magnetically oriented.
Claim 16
Dependent Claim
22 words
The process according to claim 1 wherein said ferromagnetic metal fibers have an aspect ratio in the range of 10 to 10,000.
Claim 17
Dependent Claim
111 words
A process comprising the steps (a) preparing a mixture comprising a labile ligand stabilized zerovalent metal complex wherein said complex comprises at least one ferromagnetic metal and at least one ligand selected from the group consisting of unsaturated aliphatic compounds, aromatic compounds, and organic solvents, all of which are capable of forming labile solvated zerovalent metal complexes, and an organic liquid medium, said mixture further comprising at least one substrate, which is unreactive with said liquid medium and said metallic complex, and (b) applying energy to said mixture in the presence of an externally applied magnetic field to decompose said complex and provide ferromagnetic metal fibers in and on said substrate.
Claim 18
Dependent Claim
111 words
A process comprising the steps (a) preparing a mixture comprising a labile ligand stabilized zerovalent metal complex wherein said complex comprises at least one ferromagnetic metal and at least one ligand selected from the group consisting of unsaturated aliphatic compounds, aromatic compounds, and organic solvents, all of which are capable of forming labile solvated zerovalent metal complexes, and an organic liquid medium, said mixture further comprising at least one substrate, which is unreactive with said liquid medium and said metallic complex, and (b) applying energy to said mixture in the presence of an externally applied magnetic field to decompose said complex and provide ferromagnetic metal fibers in and on said substrate.
Claim 19
Dependent Claim
28 words
The process according to claim 16 wherein said mixture further comprises 1 to 10 additional ligand stabilized zerovalent metal complexes wherein the metal is ferromagnetic or non ferromagnetic.
Claim 20
Dependent Claim
26 words
The process according to claim 16 wherein said mixture comprises 10 to 100 weight percent ferromagnetic metal compared to the total metal content of said mixture.
Claim 21
Dependent Claim
26 words
The process according to claim 16 wherein said mixture comprises 25 to 100 weight percent ferromagnetic metal compared to the total metal content of said mixture.
Claim 22
Dependent Claim
30 words
The process according to claim 16 wherein said complex is prepared by reaction of at least one metal and an arene in a liquid medium in a metal atom reactor.
Claim 23
Dependent Claim
18 words
The process according to claim 16 wherein said complex is bis(toluene)iron(0), bis(toluene)cobalt(0), bis(xylene)iron(0), bis(toluene)nickel(0), or a combination thereof.
Claim 24
Dependent Claim
19 words
The process according to claim 16 wherein said liquid medium is an aromatic compound or an unsaturated aliphatic compound.
Claim 25
Dependent Claim
15 words
The process according to claim 16 further comprising the step of passivating said metal fibers.
Claim 26
Dependent Claim
15 words
The process according to claim 16 wherein step (b) takes place in a static mode.
Claim 27
Dependent Claim
15 words
The process according to claim 16 wherein step (b) takes place in a flow mode.
Claim 28
Dependent Claim
20 words
The process according to claim 16 further comprising the step of isolating said substrate and deposited fibers from said mixture.
Claim 29
Dependent Claim
30 words
The process according to claim 16 wherein said zerovalent metal complex is bis(toluene)iron(0), bis(toluene)cobalt(0), bis(xylene)iron(0), bis(toluene)nickel(0), bis(mesitylene)cobalt(0), bis(benzene)nickel(0), bis(naphthalene) iron (0), bis(xylene)cobalt (0), bis(benzene)iron(0), bis(α,α,α-trifluorotoluene)iron(0), bis(cyclopentadienyl)(μ-cyclopentadienyl)manganese)iron, bis(cyclopentadienyl)(μ-cyclooctatetaene)dicobalt, or combinations thereof.
Claim 30
Dependent Claim
13 words
The process according to claim 16 wherein said ferromagnetic fibers are magnetically oriented.
Claim 31
Dependent Claim
21 words
The process according to claim 16 wherein said ferromagnetic fibers have an aspect ratio in the range of 10 to 10,000.
Claim 32
Dependent Claim
11 words
The process according to claim 16 wherein said substrate is inorganic.
Claim 33
Dependent Claim
21 words
The process according to claim 30 wherein said substrate is selected from the group consisting of alumina, silica, and glass beads.
Claim 34
Dependent Claim
11 words
The process according to claim 16 wherein said substrate is organic.
Claim 35
Dependent Claim
11 words
The process according to claim 32 wherein said substrate is polytetrafluoroethylene.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1993-07-09 | 1994-01-08 | 1994-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-09 | 1998-01-08 | 1998-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-09 | 2002-01-08 | 2002-07-10 | $7700.00 | Window Closed / Lapsed |