US4186244A
Expired / Lapsed
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Novel silver powder composition
Assignee: VISTATECH Corp A CORP OF
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Filing: 1977-05-03
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Granted: 1980-01-29
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Expires: 1997-05-03
Abstract
Abstract A novel silver powder composition characterized by a very low fusion, or film-forming temperature, probably assignable to the relatively small amount of oxides or other undesirable occlusions within coatings formed of the powder. The invention also relates to a new process for forming such a powder; the process is believed to involve the formation of fatty-acid silver reaction product of the surface of the silver powder before it is subjected to fusion into a metallic coating. During fusion the decomposing reactant seems to act as a flux aiding the formation of a metal film of superior appearance and strength.
Inventors
- 👤 Robert J. Deffeyes
- 👤 Harris W. Armstrong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:14
CPC Classifications
B; B22; B22F; B22F3/00; B22F3/10; B22F3/1003; B22F1/00; B22F1/10; B82; B82Y; B82Y30/00; H; H05; H05K; H05K1/00; H05K1/02; H05K1/09; H05K1/092; H05K1/097; C; C01; C01P; C01P2004/00; C01P2004/01; C01P2004/60; C01P2004/62; C01P2004/64; C01P2004/80; C01P2006/00; C01P2006/32; C01P2006/37; H05K3/00; H05K3/10; H05K3/105; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12181; Y10T428/29; Y10T428/2982; Y10T428/2991
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
56 words
A fusible particulate composition of matter having a metal powder substrate and, on the surface of said metal, an organic group which is chemically reacted with the metal of said organic group forming a protective barrier layer on said metal substrate and forming means to reduce the temperature at which said particulate composition can be fused.
Claim 2
Dependent Claim
56 words
A fusible particulate composition of matter having a metal powder substrate and, on the surface of said metal, an organic group which is chemically reacted with the metal of said organic group forming a protective barrier layer on said metal substrate and forming means to reduce the temperature at which said particulate composition can be fused.
Claim 3
Dependent Claim
15 words
A particulate composition as defined in claim 1 wherein said metal powder substrate is silver.
Claim 4
Dependent Claim
27 words
A particulate composition as defined in claim 2 wherein said fusible metal composition is formed of particles are less than about 1 micron in average particle diameter.
Claim 5
Dependent Claim
25 words
A fusible particulate composition of matter as described in claim 3, wherein said organic group comprises from 0.5 to 2% by weight of said composition.
Claim 6
Dependent Claim
18 words
A fusible particulate composition as defined in claim 3, wherein said organic group is palmitate, oleate, or stearate.
Claim 7
Dependent Claim
23 words
A composition as defined in claim 2 wherein said fusible composition may be fused at a temperature of about 300° C. or less.
Claim 8
Dependent Claim
25 words
A fusible particulate composition of matter as described in claim 6, wherein said organic group comprises from 0.5 to 2% by weight of said composition.
Claim 9
Dependent Claim
18 words
A fusible particulate composition as defined in claim 6, wherein said organic group is palmitate, oleate, or stearate.
Claim 10
Dependent Claim
14 words
A fusible particulate composition as defined in claim 6 wherein said substrate is silver.
Claim 11
Dependent Claim
30 words
A particulate composition as defined in claim 2 wherein said protective barrier is within a range of from about 0.05% to about 10% by weight of the total composition mass.
Claim 12
Dependent Claim
25 words
A particulate product as defined in claim 2 wherein the protective barrier layer is formed of aliphatic hydrocarbon groups having 8 or more carbon atoms.
Claim 13
Dependent Claim
48 words
A particulate composition as defined in claim 2 wherein said substrate is silver and comprising additionally a quantity of a second silver powder having a fusing temperature of 500° C. or above, said composition having a fluxing temperature substantially below the fusing temperature of said second silver powder.
Claim 14
Dependent Claim
25 words
A fusible particulate composition of matter as described in claim 2, wherein said organic group comprises from 0.5 to 2% by weight of said composition.
Claim 15
Dependent Claim
18 words
A fusible particulate composition as defined in claim 2, wherein said organic group is palmitate, oleate, or stearate.
Claim 16
Dependent Claim
13 words
A particulate composition as defined in claim 1 wherein said composition is non-conductive.
Claim 17
Dependent Claim
25 words
A fusible particulate composition of matter as described in claim 15, wherein said organic group comprises from 0.5 to 2% by weight of said composition.
Claim 18
Dependent Claim
18 words
A fusible particulate composition as defined in claim 15, wherein said organic group is palmitate, oleate, or stearate.
Claim 19
Dependent Claim
14 words
A fusible particulate composition as defined in claim 15 wherein said substrate is silver.
Claim 20
Dependent Claim
31 words
A particulate composition as defined in claim 1 wherein said protective barrier is within a range of from about 0.05% to about 10% by weight of the total metal composition mass.
Claim 21
Dependent Claim
25 words
A particulate product as defined in claim 19 wherein the protective barrier layer is formed of aliphatic hydrocarbon groups having 8 or more carbon atoms.
Claim 22
Dependent Claim
29 words
A particulate composition as defined in claim 1 wherein the thermal decomposition temperature of said barrier layer is above the thermal decomposition temperature of the oxalate of said metal.
Claim 23
Dependent Claim
25 words
A fusible particulate composition of matter as described in claim 21, wherein said organic group comprises from 0.5 to 2% by weight of said composition.
Claim 24
Dependent Claim
18 words
A fusible particulate composition as defined in claim 21, wherein said organic group is palmitate, oleate, or stearate.
Claim 25
Dependent Claim
25 words
A particulate product as defined in claim 1 wherein the protective barrier layer is formed of aliphatic hydrocarbon groups having 8 or more carbon atoms.
Claim 26
Dependent Claim
25 words
A fusible particulate composition of matter as described in claim 24, wherein said organic group comprises from 0.5 to 2% by weight of said composition.
Claim 27
Dependent Claim
18 words
A fusible particulate composition as defined in claim 24, wherein said organic group is palmitate, oleate, or stearate.
Claim 28
Dependent Claim
14 words
A fusible particulate composition as defined in claim 24 wherein said substrate is silver.
Claim 29
Dependent Claim
27 words
A particulate composition is formed of particles which as defined in claim 1 wherein said fusible composition are less than about 1 micron in average particle diameter.
Claim 30
Dependent Claim
25 words
A fusible particulate composition of matter as described in claim 1, wherein said organic group comprises from 0.5 to 2% by weight of said composition.
Claim 31
Dependent Claim
18 words
A fusible particulate composition as defined in claim 1, wherein said organic group is palmitate, oleate, or stearate.
Claim 32
Dependent Claim
14 words
A fusible particulate composition as defined in claim 1 wherein said substrate is silver.
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) | 1983-01-28 | 1983-07-30 | 1984-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-01-28 | 1987-07-30 | 1988-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-01-28 | 1991-07-30 | 1992-01-29 | $7700.00 | Window Closed / Lapsed |