Patent US4273583A successfully refreshed from Google Patents.
US4273583A
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Flake silver powders with chemisorbed monolayer of dispersant
Assignee: EIDP Inc
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Filing: 1979-06-29
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Granted: 1981-06-16
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Expires: 1999-06-29
Abstract
Abstract Flake silver powders which have a chemisorbed monolayer of organic dispersing agent such as oleic acid on the surfaces and process for their preparation are provided. Such silver powders can be formulated into thick film pastes at above 85% solids levels at relatively low viscosities. Pastes so obtained, when printed and fired, result in films of excellent conductive efficiency.
Inventors
- 👤 Leo W. Tyran
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:48
CPC Classifications
C; C09; C09C; C09C3/00; C09C3/006; B; B82; B82Y; B82Y30/00; C09C1/00; C09C1/62; C09C1/622; C09C3/04; C09C3/041; C09C3/08; C01; C01P; C01P2004/00; C01P2004/01; C01P2004/03; C01P2004/20; C01P2004/51; C01P2004/60; C01P2004/61; C01P2004/80; C01P2006/00; C01P2006/10; C01P2006/11; C01P2006/12; C01P2006/22; C01P2006/40; C01P2006/80; H; H05; H05K; H05K1/00; H05K1/02; H05K1/09; H05K1/092; Y; Y10; Y10S; Y10S75/00; Y10S75/954; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
54 words
A flake silver powder consisting essentially of silver particles having at least a partial chemisorbed monolayer of hydrophobic organic dispersing agent on the particle surfaces wherein said dispersing agent contains at least one olefinic unsaturation and at least one carboxylic acid group and wherein said dispersing agent comprises 0.2-0.5% by weight of the powder.
Claim 2
Dependent Claim
54 words
A flake silver powder consisting essentially of silver particles having at least a partial chemisorbed monolayer of hydrophobic organic dispersing agent on the particle surfaces wherein said dispersing agent contains at least one olefinic unsaturation and at least one carboxylic acid group and wherein said dispersing agent comprises 0.2-0.5% by weight of the powder.
Claim 3
Dependent Claim
18 words
The flake silver powder of claim 1 wherein said monolayer covers at least two-thirds of the particle surfaces.
Claim 4
Dependent Claim
20 words
The flake silver powder of claim 2 wherein said dispersing agent forms a substantially complete monolayer on the particle surfaces.
Claim 5
Dependent Claim
25 words
The flake silver powder of claim 1 wherein said dispersing agent is selected from the group consisting of oleic acid, linoleic acid, and linolenic acid.
Claim 6
Dependent Claim
14 words
The flake silver powder of claim 4 wherein said dispersing agent is oleic acid.
Claim 7
Dependent Claim
22 words
A flake silver powder consisting essentially of silver particles having a substantially complete monolayer of oleic acid chemisorbed on the particle surfaces.
Claim 8
Dependent Claim
22 words
A flake silver powder consisting essentially of silver particles having a substantially complete monolayer of oleic acid chemisorbed on the particle surfaces.
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) | 1984-06-15 | 1984-12-15 | 1985-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-15 | 1988-12-15 | 1989-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-06-15 | 1992-12-15 | 1993-06-16 | $7700.00 | Window Closed / Lapsed |