Patent US5320781A successfully refreshed from Google Patents.
US5320781A
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Conductive pigment
Assignee: Merck Patent GmbH
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Filing: 1993-04-16
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Granted: 1994-06-14
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Expires: 2013-04-16
Abstract
Abstract There is disclosed an electrically conductive pigment containing 20 to 95% by weight of a component A comprising one or more conductive platelet-like pigments and 5 to 80% by weight of a component B comprising one or more conductive needle-shaped or fibrous pigments.
Inventors
- 👤 Otto Stahlecker
- 👤 Manfred Thon
- 👤 Ralf Glausch
- 👤 Gerhard Pfaff
- 👤 Manfred Kieser
- 👤 Wilhelm Gobel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:44
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/02; C09D11/03; C09D11/037; C08; C08K; C08K7/00; C08K9/00; C08K9/02; C09C; C09C1/00; C09C1/0081; C09C1/40; C09C1/405; C09D5/00; C09D5/24; H; H01; H01B; H01B1/00; H01B1/06; H01B1/08; H01B1/20; C01; C01P; C01P2002/00; C01P2002/02; C01P2004/00; C01P2004/10; C01P2004/20; C01P2004/30; C01P2004/32; C01P2004/38; C01P2004/54; C01P2004/60; C01P2004/61; C01P2004/80; C01P2006/00; C01P2006/40; C01P2006/60; C01P2006/80; H05; H05K; H05K1/00; H05K1/02; H05K1/09; H05K1/092; H05K1/095; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
39 words
An electroconductive pigment comprising 5 to 95% by weight of a component A which comprises at least one electroconductive platelet-shaped pigment, and 5% to 95% by weight of a component B which comprises at least one electroconductive non-platelet-shaped pigment.
Claim 2
Dependent Claim
39 words
An electroconductive pigment comprising 5 to 95% by weight of a component A which comprises at least one electroconductive platelet-shaped pigment, and 5% to 95% by weight of a component B which comprises at least one electroconductive non-platelet-shaped pigment.
Claim 3
Dependent Claim
49 words
A pigment according to claim 1, wherein the platelet-shaped pigment of component A comprises (a) a platelet-shaped support optionally coated with at least one metal oxide, (b) a platelet-shaped metal oxide, each of (a) and (b) being coated with a conductive layer, or (c) a conductive platelet-shaped metal oxide.
Claim 4
Dependent Claim
29 words
A pigment according to claim 1, wherein the conductive layer is a metal oxide doped with a metal or with a halogen, is an inherently conductive compound or metal.
Claim 5
Dependent Claim
28 words
A pigment according to claim 3, wherein the conductive layer is antimony doped tin oxide, aluminum doped zinc oxide, fluorine doped tin oxide or fluorine doped titanium oxide.
Claim 6
Dependent Claim
24 words
A pigment according to claim 1 wherein the pigment of component B comprises particles having approximately identical dimensions along all three directions in space.
Claim 7
Dependent Claim
13 words
A pigment according to claim 5, wherein the particles are cubes or spheres.
Claim 8
Dependent Claim
51 words
A pigment according to claim 1, wherein the pigment of component B is (a) at least one non-platelet-shaped metal oxide, (b) is a non-platelet-shaped support coated with at least one metal oxide, each of (a) and (b) being coated with a conductive layer, or is (c) a conductive non-platelet-shaped metal oxide.
Claim 9
Dependent Claim
29 words
A pigment according to claim 7, wherein the conductive layer is a metal oxide doped with a metal or with a halogen, is an inherently conductive compound or metal.
Claim 10
Dependent Claim
28 words
A pigment according to claim 8, wherein the conductive layer is antimony doped tin oxide, aluminum doped zinc oxide, fluorine doped tin oxide or fluorine doped titanium oxide.
Claim 11
Dependent Claim
17 words
A pigment according to claim 7, wherein component B contains at least one needle-shaped or fibrous pigment.
Claim 12
Dependent Claim
15 words
A pigment according to claim 2, wherein the support is mica, talc, kaolin or glass.
Claim 13
Dependent Claim
13 words
A pigment according to claim 1, wherein component A is a nacreous pigment.
Claim 14
Dependent Claim
26 words
A pigment according to claim 7, wherein the support is particles of barium sulfate, mica, kaolin or talc, or fibers of glass alumina or titanium dioxide.
Claim 15
Dependent Claim
12 words
A pigment according to claim 1, wherein component B is carbon fibers.
Claim 16
Dependent Claim
39 words
A process for the preparation of a pigment according to claim 1, comprising mixing platelet-like and non-platelet-like base materials, optionally coating said materials with metal oxide and coating said materials with a doped metal oxide or inherently conductive compound.
Claim 17
Dependent Claim
25 words
In a paint, printing ink, plastic system or coating pigmented with a conductive pigment, the improvement wherein the pigment is one according to claim 1.
Claim 18
Dependent Claim
16 words
A pigment according to claim 1, comprising at least 50% by weight of the platelet-shaped pigment.
Claim 19
Dependent Claim
25 words
In a paint, printing ink, plastic system or coating pigmented with a conductive pigment, the improvement wherein the pigment is one according to claim 17.
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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) | 1997-06-13 | 1997-12-13 | 1998-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-06-13 | 2001-12-13 | 2002-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-06-13 | 2005-12-13 | 2006-06-14 | $7700.00 | Window Closed / Lapsed |