US5286416A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Galvanically compatible conductive filler useful for electromagnetic shielding and corrosion protection
Assignee: Potters Industries LLC
•
Filing: 1992-09-22
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Granted: 1994-02-15
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Expires: 2012-09-22
Abstract
Abstract Composite particles designed as a filler for gaskets, caulking compounds and plastics in general. The unique properties are obtained by using a soft metal core galvanically similar to the metal the sealant will be in contact with. The oxide surface of the core metal is typically breached by a multitude of small hard semiconductive or conductive particles, thus making low particle-to-particle contact resistance through the body.
Inventors
- 👤 Robert J. Teichmann
- 👤 James F. Walther
- 👤 Andrew M. Wasowicz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 11:56
CPC Classifications
H; H05; H05K; H05K9/00; H05K9/0073; H05K9/0081; H05K9/0083; B; B05; B05D; B05D5/00; B05D5/12; C; C09; C09D; C09D5/00; C09D5/08; C09D5/082; C09D5/084; C09D5/24; C09D5/34; H01; H01B; H01B1/00; H01B1/02; H01B1/023; H01B1/06; H01B1/08; H01B1/10; H01B1/14; H01B1/16; H01B1/20; H01B1/22; H05K9/0007; H05K9/0015; H05K9/0079; B05D2601/00; B05D2601/20; C01; C01P; C01P2004/00; C01P2004/01; C01P2004/03; C01P2004/30; C01P2004/32; C01P2004/34; C01P2004/60; C01P2004/61; C01P2004/62; C01P2004/80; C01P2006/00; C01P2006/40; C01P2006/80; C01P2006/90; Y; Y10; Y10S; Y10S420/00; Y10S420/903; Y10T; Y10T428/00; Y10T428/25; Y10T428/256; Y10T428/257; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2993; Y10T428/2996
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
58 words
An electromagnetic energy shielding or electrostatic dissipation material comprising in combination: (a) a matrix; and (b) a plurality of composite particles dispersed throughout said matrix; each of said particles comprising in combination an electrically conductive core material having a surface oxide layer and an electrically conductive refractory material, said core material and said refractory material being conductively fused.
Claim 2
Dependent Claim
58 words
An electromagnetic energy shielding or electrostatic dissipation material comprising in combination: (a) a matrix; and (b) a plurality of composite particles dispersed throughout said matrix; each of said particles comprising in combination an electrically conductive core material having a surface oxide layer and an electrically conductive refractory material, said core material and said refractory material being conductively fused.
Claim 3
Dependent Claim
29 words
A material as defined in claim 1, wherein the particle is configured such that the refractory material provides a conductive path through said oxide layer to said core material.
Claim 4
Dependent Claim
33 words
An electromagnetic energy shielding material according to claim 1, wherein said refractory material breaches said oxide layer so as to make contact with said core material and extends outwardly from said oxide layer.
Claim 5
Dependent Claim
41 words
An electromagnetic energy shielding material according to claim 3, wherein said refractory material comprises a plurality of particles, each of which breaches said oxide layer so as to make contact with said core material and extends outwardly from said oxide layer.
Claim 6
Dependent Claim
19 words
An electromagnetic energy shielding material according to claim 1, wherein said core material comprises a metal or metal alloy.
Claim 7
Dependent Claim
20 words
An electromagnetic energy shielding material according to claim 1, wherein said core material is aluminum, tin, zinc, nickel or magnesium.
Claim 8
Dependent Claim
40 words
An electromagnetic energy shielding material according to claim 1, wherein said refractory material is WC, NbB, NbB 2 , TiN, VSi 2 , MoB, TiB 2 , ZrB 2 , B 4 C, ZrN, CoSi 2 or MoSi 2 .
Claim 9
Dependent Claim
20 words
An electromagnetic shielding material according to claim 1, wherein said core material is Al and said refractory material is WC.
Claim 10
Dependent Claim
20 words
An electromagnetic shielding material according to claim 1, wherein said core material is Al and said refractory material is TiN.
Claim 11
Dependent Claim
22 words
An electromagnetic shielding material according to claim 1, wherein said core material is Al and said refractory material is VSi 2 .
Claim 12
Dependent Claim
20 words
An electromagnetic shielding material according to claim 1, wherein said core material is Al and said refractory material is NbB.
Claim 13
Dependent Claim
20 words
An electromagnetic shielding material according to claim 1, wherein said core material is Sn and said refractory material is WC.
Claim 14
Dependent Claim
20 words
An electromagnetic shielding material according to claim 1, wherein said core material is Sn and said refractory material is NbB.
Claim 15
Dependent Claim
41 words
An electromagnetic energy shielding material according to claim 1, wherein said core material is present in an amount of about 10 to 99.5 weight percent and said refractory material is present in an amount of about 90 to 0.5 weight percent.
Claim 16
Dependent Claim
48 words
An electromagnetic energy shielding material according to claim 1, wherein the core has a particle size of about 0.5 to 200 microns, the oxide layer has a thickness of about 2 to 10,000 angstroms and the refractory material has a particle size of about 0.005 to 20 microns.
Claim 17
Dependent Claim
38 words
An electromagnetic energy shielding material according to claim 1, wherein the particles of the refractory material are of size ranging from about twice the thickness of the oxide layer to about one-tenth the size of the core particle.
Claim 18
Dependent Claim
22 words
An electromagnetic energy shielding material according to claim 1, wherein said core material has a hardness of about 1 to 6 Mohs.
Claim 19
Dependent Claim
24 words
An electromagnetic energy shielding material according to claim 1, wherein said refractory material has a hardness greater than the hardness of the core material.
Claim 20
Dependent Claim
23 words
An electromagnetic energy shielding material according to claim 1, wherein said material is in the form of a gasket, caulk, adhesive or coating.
Claim 21
Dependent Claim
14 words
An electromagnetic energy shielding material according to claim 1, wherein said binder is silicone
Claim 22
Dependent Claim
27 words
An electromagnetic energy shielding material according to claim 1, wherein said binder is present in said material in an amount of about 20 to 80% by weight.
Claim 23
Dependent Claim
54 words
A corrosion protection material comprising in combination: (a) a matrix; and (b) a plurality of composite particles dispersed throughout said matrix; each of said particles comprising in combination an electrically conductive core material having a surface oxide layer and an electrically conductive refractory material, said core material and said refractory material being conductively fused.
Claim 24
Dependent Claim
54 words
A corrosion protection material comprising in combination: (a) a matrix; and (b) a plurality of composite particles dispersed throughout said matrix; each of said particles comprising in combination an electrically conductive core material having a surface oxide layer and an electrically conductive refractory material, said core material and said refractory material being conductively fused.
Claim 25
Dependent Claim
29 words
A material as defined in claim 22, wherein the particle is configured such that the refractory material provides a conductive path through said oxide layer to said core material.
Claim 26
Dependent Claim
30 words
A material according to claim 22, wherein said refractory material breaches said oxide layer so as to make contact with said core material and extends outwardly from said oxide layer.
Claim 27
Dependent Claim
38 words
A material according to claim 24, wherein said refractory material comprises a plurality of particles, each of which breaches said oxide layer so as to make contact with said core material and extends outwardly from said oxide layer.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-02-14 | 1997-08-16 | 1998-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-02-14 | 2001-08-16 | 2002-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-02-14 | 2005-08-16 | 2006-02-15 | $7700.00 | Window Closed / Lapsed |