US4624865A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrically conductive microballoons and compositions incorporating same
Assignee: GRAHAM OWEN BJ
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Filing: 1984-05-21
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Granted: 1986-11-25
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Expires: 2004-05-21
Abstract
Abstract Electrically conductive microparticles characterized by high conductivity and low density are comprised of electrically nonconductive microballoons having an electrically conductive coating of a metal. When dispersed in an electrically nonconductive matrix, an electrically conductive composite material is formed in which the microparticles form a network of contacting particles throughout the matrix.
Inventors
- 👤 Wayne L. Gindrup
- 👤 Rebecca R. Vinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:19
CPC Classifications
H; H05; H05K; H05K9/00; H05K9/0073; H05K9/0081; H05K9/0083; C; C03; C03C; C03C17/00; C03C17/06; C03C17/10; C03C17/22; C04; C04B; C04B20/00; C04B20/10; C04B20/1055; C04B20/1062; C04B41/00; C04B41/45; C04B41/4584; C08; C08K; C08K7/00; C08K7/22; C08K7/24; C08K7/26; C08K9/00; C08K9/02; C08K9/12; C09; C09C; C09C3/00; C09C3/06; C09C3/066; C09D; C09D5/00; C09D5/24; C09D5/32; H01; H01B; H01B1/00; H01B1/20; H01B1/22; H01Q; H01Q17/00; H01Q17/002; C01; C01P; C01P2004/00; C01P2004/30; C01P2004/32; C01P2004/34; C01P2004/60; C01P2004/61; C01P2004/80; C01P2006/00; C01P2006/10; C01P2006/40; C03C2217/00; C03C2217/20; C03C2217/28; H05K1/00; H05K1/02; H05K1/09; H05K1/092; H05K1/095; H05K3/00; H05K3/30; H05K3/32; H05K3/321; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2993; Y10T428/2996
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
93 words
A method of producing bright, mirror-like silver coated magnetic ceramic microballons comprising providing a quantity of microballons formed of a ceramic material comprising a magnetic material selected from the group consisting of iron, nickel, iron oxide, ferrite, and mixtures of these materials imparting magnetic properties of the microballon, dispersing the microballons in a plating solution consisting essentially of (a) a silver salt; (b) a reducing sugar and (c) an organic chelating agent and chemically reducing the silver salt to form a bright, mirror-like silver coating on the surface of the ceramic magnetic microballons.
Claim 2
Independent Claim
93 words
A method of producing bright, mirror-like silver coated magnetic ceramic microballons comprising providing a quantity of microballons formed of a ceramic material comprising a magnetic material selected from the group consisting of iron, nickel, iron oxide, ferrite, and mixtures of these materials imparting magnetic properties of the microballon, dispersing the microballons in a plating solution consisting essentially of (a) a silver salt; (b) a reducing sugar and (c) an organic chelating agent and chemically reducing the silver salt to form a bright, mirror-like silver coating on the surface of the ceramic magnetic microballons.
Claim 3
Independent Claim
79 words
A method of producing an eletrically conductive bright mirror-like metal coating on the surface of microballoons comprising dispersing the microballoons in a plating solution consisting essentially of (a) a salt of one or more metals selected from the group consisting of silver, copper, nickel, gold, platinum, osmium, iridium, and tin; (b) a reducing sugar and (c) an organic chelating agent and chemical reducing the metal salt to form a bright mirror-like metal coating on the surface of the microballoons.
Claim 4
Independent Claim
79 words
A method of producing an eletrically conductive bright mirror-like metal coating on the surface of microballoons comprising dispersing the microballoons in a plating solution consisting essentially of (a) a salt of one or more metals selected from the group consisting of silver, copper, nickel, gold, platinum, osmium, iridium, and tin; (b) a reducing sugar and (c) an organic chelating agent and chemical reducing the metal salt to form a bright mirror-like metal coating on the surface of the microballoons.
Claim 5
Independent Claim
90 words
A method of producing an electrically conductive bright mirror-like coating on the surface of microballoons comprising sensitizing the surface of the microballons by treatment with the salt of a metal selected from the gorup consisting of tin, platinum, and palladium, and thereafter forming a bright, mirror-like metal plating onto the sensitized surface by chemically reducing with a reducing sugar in the presence of an organic chelating agent a salt of one or more metals selected from the group consisting of silver, copper, nickel, gold, platinum, palladium, osmium, iridium and tin.
Claim 6
Independent Claim
90 words
A method of producing an electrically conductive bright mirror-like coating on the surface of microballoons comprising sensitizing the surface of the microballons by treatment with the salt of a metal selected from the gorup consisting of tin, platinum, and palladium, and thereafter forming a bright, mirror-like metal plating onto the sensitized surface by chemically reducing with a reducing sugar in the presence of an organic chelating agent a salt of one or more metals selected from the group consisting of silver, copper, nickel, gold, platinum, palladium, osmium, iridium and tin.
Claim 7
Dependent Claim
24 words
A method according to claim 2 or 3 wherein the metal salt which is chemically reduced to form said metal coating comprises silver nitrate.
Claim 8
Dependent Claim
29 words
A method according to claim 2 or 3 wherein the microballoons have a diameter between about 1 and 500 microns and a specific gravity of between 0.2 and 2.
Claim 9
Dependent Claim
14 words
A method according to claim 2 or 3 wherein the microballoons comprise ceramic microballoons.
Claim 10
Dependent Claim
14 words
A method according to claim 2 or 3 wherein the microballoons comprise glass microballoons.
Claim 11
Independent Claim
92 words
A method of producing an electrically conductive bright, mirror-like metal coating on the surface of microballoons comprising providing a quantity of alkaline microballoons, dispersing the microballoons in an acidic aqueous solution, then dispersing the microballoons in a plating solution consisting essentially of (a) a salt of one or more metals selected from the group consisting of silver, copper, nickel, gold, platinum, osmium, iridium and tin; (b) a reducing sugar and (c) an organic chelating agent and chemically reducing the metal salt to form a metal coating on the surface of the microballoons.
Claim 12
Independent Claim
92 words
A method of producing an electrically conductive bright, mirror-like metal coating on the surface of microballoons comprising providing a quantity of alkaline microballoons, dispersing the microballoons in an acidic aqueous solution, then dispersing the microballoons in a plating solution consisting essentially of (a) a salt of one or more metals selected from the group consisting of silver, copper, nickel, gold, platinum, osmium, iridium and tin; (b) a reducing sugar and (c) an organic chelating agent and chemically reducing the metal salt to form a metal coating on the surface of the microballoons.
Claim 13
Dependent Claim
43 words
A method according to claim 8 wherein said step of dispersing the microballoons in an acidic solution comprises dispersing the microballoons in a sensitizing solution containing an acid and a salt of metal selected from the group consisting of tin, platinum and palladium.
Claim 14
Dependent Claim
28 words
A method according to claim 9 wherein the metal salt in said plating solution comprises silver nitrate and the metal salt in said acidic solution comprises stannous chloride.
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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) | 1989-11-24 | 1990-05-26 | 1990-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-11-24 | 1994-05-26 | 1994-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-11-24 | 1998-05-26 | 1998-11-25 | $7700.00 | Window Closed / Lapsed |