US4447492A
Expired / Lapsed
US
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Articles having an electrically conductive surface
Assignee: Occidental Chemical Corp
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Filing: 1981-08-07
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Granted: 1984-05-08
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Expires: 2001-08-07
Abstract
Abstract Electrically conductive articles which comprise a non-conductive substrate having thereon a substantially uniform, electrically conductive dispersion of finely divided particles of ferroalloys, silicon alloys, or mixtures thereof, are described. The articles are useful as components of electrical switches, contacts, connectors, circuit boards or electromagnetic interference shields. The conductive portion of the article may be subsequently electroplated or electrostatically painted.
Inventors
- 👤 James P. McKaveney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:02
CPC Classifications
H; H01; H01B; H01B1/00; H01B1/14; H01B1/16; H01B1/20; H01B1/22; H05; H05K; H05K1/00; H05K1/02; H05K1/09; H05K1/092; H05K1/095; H05K3/00; H05K3/22; H05K3/24; H05K3/245; Y; Y10; Y10S; Y10S428/00; Y10S428/90; Y10T; Y10T428/00; Y10T428/25; Y10T428/256; Y10T428/259; Y10T428/31504; Y10T428/31678; Y10T428/31681; Y10T428/31703
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
91 words
An electrically conductive article having a non-conductive substrate which substrate has at least a portion of the surface thereof coated with a composition comprising about 3 to about 80 percent by weight of a binder and about 20 to about 97 percent by weight of a filler, the filler comprising particles, having an average particle size of from about 2 to about 10 microns, of a refractory ferroalloy selected from the group consisting of ferromanganese silicon, ferromanganese, ferromolybdenum, ferrosilicon, ferrochrome, ferrovanadium, ferrozirconium, ferrotitanium, ferrotungsten, ferroboron, ferrophosphorus, iron carbide, and mixtures thereof.
Claim 2
Dependent Claim
91 words
An electrically conductive article having a non-conductive substrate which substrate has at least a portion of the surface thereof coated with a composition comprising about 3 to about 80 percent by weight of a binder and about 20 to about 97 percent by weight of a filler, the filler comprising particles, having an average particle size of from about 2 to about 10 microns, of a refractory ferroalloy selected from the group consisting of ferromanganese silicon, ferromanganese, ferromolybdenum, ferrosilicon, ferrochrome, ferrovanadium, ferrozirconium, ferrotitanium, ferrotungsten, ferroboron, ferrophosphorus, iron carbide, and mixtures thereof.
Claim 3
Dependent Claim
10 words
The article of claim 1 wherein the ferroalloy is ferrophosphorus.
Claim 4
Dependent Claim
10 words
The article of claim 1 wherein the ferroalloy is ferroboron.
Claim 5
Dependent Claim
21 words
The article of claim 1 wherein the ferroalloy has an average particle size ranging between about 5 and about 7 microns.
Claim 6
Dependent Claim
11 words
The article of claim 1 wherein the non-conductive substrate is glass.
Claim 7
Dependent Claim
13 words
The article of claim 1 wherein the non-conductive substrate is a ceramic material.
Claim 8
Dependent Claim
11 words
The article of claim 1 wherein the non-conductive substrate is plaster.
Claim 9
Dependent Claim
12 words
The article of claim 1 wherein the non-conductive substrate is cellulosic material.
Claim 10
Dependent Claim
20 words
The article of claim 1, wherein the coating composition contains additional conductive material other than a ferroalloy having magnetic qualities.
Claim 11
Dependent Claim
13 words
The article of claim 1 wherein the non-conductive substrate is a plastic material.
Claim 12
Dependent Claim
10 words
The article of claim 10 wherein the ferroalloy is ferrophosphorus.
Claim 13
Dependent Claim
10 words
The article of claim 10 wherein the ferroalloy is ferroboron.
Claim 14
Dependent Claim
79 words
An electrically conductive article having a non-conductive substrate which substrate has at least a portion of the surface thereof coated with a composition comprising about 3 to about 80 percent by weight of a binder and about 20 to about 97 percent by weight of a filler, the filler comprising particles, having an average particle size of from about 2 to about 10 microns, of a material selected from the group consisting of silicon alloys, silicides, and mixtures thereof.
Claim 15
Dependent Claim
79 words
An electrically conductive article having a non-conductive substrate which substrate has at least a portion of the surface thereof coated with a composition comprising about 3 to about 80 percent by weight of a binder and about 20 to about 97 percent by weight of a filler, the filler comprising particles, having an average particle size of from about 2 to about 10 microns, of a material selected from the group consisting of silicon alloys, silicides, and mixtures thereof.
Claim 16
Dependent Claim
91 words
An electrically conductive article having a non-conductive substrate which substrate has at least a portion of the surface thereof coated with a composition comprising about 3 to about 80 percent by weight of a binder and about 20 to about 97 percent by weight of a filler, the filler comprising particles, having an average particle size of from about 2 to about 10 microns, of a material selected from the group consisting of calsibar, magnesium-ferrosilicon, hypercal, silico-manganese, magnesium silicide, manganese titanium silicide, chromium silicide, nickel silicide, cobalt silicide, and mixtures thereof.
Claim 17
Dependent Claim
91 words
An electrically conductive article having a non-conductive substrate which substrate has at least a portion of the surface thereof coated with a composition comprising about 3 to about 80 percent by weight of a binder and about 20 to about 97 percent by weight of a filler, the filler comprising particles, having an average particle size of from about 2 to about 10 microns, of a material selected from the group consisting of calsibar, magnesium-ferrosilicon, hypercal, silico-manganese, magnesium silicide, manganese titanium silicide, chromium silicide, nickel silicide, cobalt silicide, and mixtures thereof.
Claim 18
Dependent Claim
93 words
An electrically conductive article having a non-conductive substrate which substrate has at least a portion of the surface thereof coated with a composition comprising about 3 to about 80 percent by weight of a synthetic resin binder and about 20 to about 97 percent by weight of a filler, the filler comprising particles, having an average particle size of from about 2 to about 10 microns, of a refractory ferroalloy selected from the group consisting of ferromanganese silicon, ferromanganese, ferromolybdenum, ferrosilicon, ferrochrome, ferrovanadium, ferrozirconium, ferrotitanium, ferrotungsten, ferroboron, ferrophosphorus, iron carbide, and mixtures thereof.
Claim 19
Dependent Claim
93 words
An electrically conductive article having a non-conductive substrate which substrate has at least a portion of the surface thereof coated with a composition comprising about 3 to about 80 percent by weight of a synthetic resin binder and about 20 to about 97 percent by weight of a filler, the filler comprising particles, having an average particle size of from about 2 to about 10 microns, of a refractory ferroalloy selected from the group consisting of ferromanganese silicon, ferromanganese, ferromolybdenum, ferrosilicon, ferrochrome, ferrovanadium, ferrozirconium, ferrotitanium, ferrotungsten, ferroboron, ferrophosphorus, iron carbide, and mixtures thereof.
Claim 20
Dependent Claim
10 words
The article of claim 15 wherein the ferroalloy is ferrophosphorus.
Claim 21
Dependent Claim
10 words
The article of claim 15 wherein the ferroalloy is ferroboron.
Claim 22
Dependent Claim
21 words
The article of claim 15 wherein the ferroalloy has an average particle size of from about 5 to about 7 microns.
Claim 23
Dependent Claim
13 words
The article of claim 15 wherein the non-conductive substrate is a plastic material.
Claim 24
Dependent Claim
19 words
The article of claim 19 wherein coating composition has a thickness of from about 0.4 to about 15 mils.
Claim 25
Independent Claim
93 words
A method of rendering a non-conductive substrate electromagnetic shielding comprising applying to at least a portion of the surface of said non-conductive substrate a composition comprising about 3 to about 80 percent by weight of a binder and about 20 to about 97 percent by weight of a filler, the filler comprising particles, having an average particle size of from about 2 to about 10 microns, of a refractory ferroalloy selected from the group consisting of ferromanganese silicon, ferromanganese, ferromolybdenum, ferrosilicon, ferrochrome, ferrovanadium, ferrozirconium, ferrotitanium, ferrotungsten, ferroboron, ferrophosphorus, iron carbide, and mixtures thereof.
Claim 26
Independent Claim
93 words
A method of rendering a non-conductive substrate electromagnetic shielding comprising applying to at least a portion of the surface of said non-conductive substrate a composition comprising about 3 to about 80 percent by weight of a binder and about 20 to about 97 percent by weight of a filler, the filler comprising particles, having an average particle size of from about 2 to about 10 microns, of a refractory ferroalloy selected from the group consisting of ferromanganese silicon, ferromanganese, ferromolybdenum, ferrosilicon, ferrochrome, ferrovanadium, ferrozirconium, ferrotitanium, ferrotungsten, ferroboron, ferrophosphorus, iron carbide, and mixtures thereof.
Claim 27
Dependent Claim
19 words
The method of claim 21 wherein said composition additionally contains conductive material other than a ferroalloy having magnetic qualities.
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) | 1987-05-08 | 1987-11-07 | 1988-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-08 | 1991-11-07 | 1992-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-08 | 1995-11-07 | 1996-05-08 | $7700.00 | Window Closed / Lapsed |