US4289534A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal powder paint composition
Assignee: VISTATECH Corp A CORP OF
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Filing: 1979-07-30
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Granted: 1981-09-15
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Expires: 1999-07-30
Abstract
Abstract A novel silver powder paint 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 a 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
2026-10-28 07:32
CPC Classifications
H; H05; H05K; H05K1/00; H05K1/02; H05K1/09; H05K1/092; H05K1/097; B; B22; B22F; B22F1/00; B22F1/10; B22F3/00; B22F3/10; B22F3/1003; B82; B82Y; B82Y30/00; C; C09; C09C; C09C1/00; C09C1/62; C09D; C09D5/00; C09D5/24; C09D5/38; H01; H01B; H01B1/00; H01B1/14; H01B1/16; C01; C01P; C01P2004/00; C01P2004/01; C01P2004/02; C01P2004/60; C01P2004/61; C01P2004/62; C01P2004/64; C01P2004/80; C01P2006/00; C01P2006/32; C01P2006/37; H05K3/00; H05K3/10; H05K3/105
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
72 words
In a paint composition comprising a liquid vehicle and a non-conductive metal powder composition, the improvement comprising said metal powder composition being formed of (a) a metal powder substrate and (b) organic groups chemically bonded to said metal powder substrate and forming a protective barrier between the metal particles, said metal powders being thermally convertable into fusible metal powder and subsequently into a conductive mass, upon the destruction of said protective barrier.
Claim 2
Dependent Claim
72 words
In a paint composition comprising a liquid vehicle and a non-conductive metal powder composition, the improvement comprising said metal powder composition being formed of (a) a metal powder substrate and (b) organic groups chemically bonded to said metal powder substrate and forming a protective barrier between the metal particles, said metal powders being thermally convertable into fusible metal powder and subsequently into a conductive mass, upon the destruction of said protective barrier.
Claim 3
Dependent Claim
14 words
A paint composition as defined in claim 1 wherein said metal powder is silver.
Claim 4
Dependent Claim
31 words
A paint 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 5
Dependent Claim
29 words
A paint 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 6
Dependent Claim
23 words
A paint composition as defined in claim 2 wherein said fusible metal particles are less than about 1 micron in average particle diameter.
Claim 7
Dependent Claim
25 words
A paint composition as defined in claim 2 wherein said fusible metal particles may be fused at a temperature of about 300° C. or less.
Claim 8
Dependent Claim
26 words
A paint composition product as defined in claim 1 wherein the protective barrier layer is formed of aliphatic hydrocarbon groups having 8 or more carbon atoms.
Claim 9
Dependent Claim
23 words
A paint composition as defined in claim 1 wherein said fusible metal particles are less than about 1 micron in average particle diameter.
Claim 10
Dependent Claim
31 words
A paint 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 metal composition mass.
Claim 11
Dependent Claim
26 words
A paint composition product as defined in claim 2 wherein the protective barrier layer is formed of aliphatic hydrocarbon groups having 8 or more carbon atoms.
Claim 12
Dependent Claim
26 words
A paint composition product as defined in claim 3 wherein the protective barrier layer is formed of aliphatic hydrocarbon groups having 8 or more carbon atoms.
Claim 13
Dependent Claim
37 words
A paint composition as defined in claim 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, or 11, wherein said organic groups bonded to said metal powder substrate are resistant to removal by washing with tetrahydrofuran.
Claim 14
Dependent Claim
29 words
A paint composition as defined in claim 1, 2, 3, or 6, wherein said metal substrate powder has an average particle size of from about 0.02 to 0.05 microns.
Claim 15
Dependent Claim
25 words
A paint composition as defined in claim 2 wherein said metal substrate powder has an average particle size of from about 0.02 to 0.05 microns.
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) | 1984-09-14 | 1985-03-16 | 1985-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-14 | 1989-03-16 | 1989-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-14 | 1993-03-16 | 1993-09-15 | $7700.00 | Window Closed / Lapsed |