US4463030A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for forming novel silver powder composition
Assignee: Vistatech Corp
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Filing: 1980-12-24
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Granted: 1984-07-31
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Expires: 2000-12-24
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 occulsions 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 on 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
2026-11-03 16:08
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/10; H05K3/105; B; B22; B22F; B22F3/00; B22F3/10; B22F3/1003; B82; B82Y; B82Y30/00; C; C09; C09C; C09C1/00; C09C1/62; C09D; C09D5/00; C09D5/08; C09D5/10; H01; H01B; H01B1/00; H01B1/14; H01B1/16; H05K1/00; H05K1/02; H05K1/09; H05K1/092; H05K1/097; C01; C01P; C01P2004/00; C01P2004/01; C01P2004/02; C01P2004/60; C01P2004/61; C01P2004/62; C01P2004/64; C01P2004/80; C01P2006/00; C01P2006/32; C01P2006/37; H05K2203/00; H05K2203/11; H05K2203/1105; H05K2203/12; H05K2203/121
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
73 words
A process for making a metal powder product comprising the steps of: (a) mixing an organometallic salt of a metal and a carboxylic acid in a liquid organic reactant; and, simultaneously (b) decomposing said salt to form a metal powder in the presence of said reactant; and (c) forming a protective barrier about newly formed particles of said metal powder by reacting said organic reactant with newly formed particles of said metal powder.
Claim 2
Dependent Claim
73 words
A process for making a metal powder product comprising the steps of: (a) mixing an organometallic salt of a metal and a carboxylic acid in a liquid organic reactant; and, simultaneously (b) decomposing said salt to form a metal powder in the presence of said reactant; and (c) forming a protective barrier about newly formed particles of said metal powder by reacting said organic reactant with newly formed particles of said metal powder.
Claim 3
Dependent Claim
24 words
A process as defined in claim 1 wherein said organic reactant is a carboxylic acid having a chain of at least 8 carbon atoms.
Claim 4
Dependent Claim
12 words
A process as defined in claim 1 wherein said metal is silver.
Claim 5
Dependent Claim
14 words
A process as defined in claim 2 wherein said organometallic salt is an oxalate.
Claim 6
Dependent Claim
18 words
A process as defined in claim 1 wherein some copper is incorporated into said oxalate with said silver.
Claim 7
Dependent Claim
12 words
A process as defined in claim 2 wherein said metal is silver.
Claim 8
Dependent Claim
12 words
A process as defined in claim 4 wherein said metal is silver.
Claim 9
Dependent Claim
27 words
A process as defined in claim 2 wherein said carboxylic acid reacted to form a protective barrier about newly formed particles of silver powder, is oxalic acid.
Claim 10
Dependent Claim
27 words
A process as defined in claim 6 wherein said carboxylic acid, reacted to form a protective barrier about newly formed particles of silver powder, is palmitic acid.
Claim 11
Dependent Claim
20 words
A process as defined in claim 8 wherein said powder is fusible into a metallic silver film at 250° C.
Claim 12
Dependent Claim
40 words
A process as defined in claim 6 wherein said organic reactant forming said reactive barrier is coated upon said silver powder in a quantity effective to make said powder non-conductive and fusible to a conductive powder at about 250° C.
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) | 1987-07-31 | 1988-01-30 | 1988-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-31 | 1992-01-30 | 1992-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-31 | 1996-01-30 | 1996-07-31 | $7700.00 | Window Closed / Lapsed |