US4634623A
Expired / Lapsed
US
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Conductive elastomeric ink composition
Assignee: Gates Corp
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Filing: 1985-02-04
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Granted: 1987-01-06
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Expires: 2005-02-04
Abstract
Abstract A conductive elastomeric ink is described comprised of very fine nickel particles admixed in a silicone binder. The ink has utility in elastomeric switch control devices, printed circuits and the like.
Inventors
- 👤 Richard L. Watkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:18
CPC Classifications
H; H01; H01H; H01H13/00; H01H13/70; H01H13/78; H01H13/785; C; C08; C08K; C08K3/00; C08K3/02; C08K3/08; H01B; H01B1/00; H01B1/20; H01B1/22; H01H13/702; H05; H05K; H05K1/00; H05K1/02; H05K1/09; H05K1/092; H05K1/095; H01H2201/00; H01H2201/022; H01H2201/032; H01H2215/00; H01H2215/004; H01H2215/008; H01H2217/00; H01H2217/02; H01H2221/00; H01H2221/002; H01H2221/006; H01H2227/00; H01H2227/002; H01H2227/012; H01H2227/014; H01H2227/018; H01H2229/00; H01H2229/002; H01H2229/004; H01H2229/058; H01H2233/00; H01H2233/01; H01H2233/02; H01H2233/022; Y; Y10; Y10S; Y10S428/00; Y10S428/901; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24893; Y10T428/24909; Y10T428/24917
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
54 words
An electrically conductive elastomeric ink composition which comprises an elastomeric silicone binder and finely divided nickel particles interspersed therein in an amount from about 25 to about 90 percent by weight based on the weight of the composition, the nickel particles having a size in the range from about 0.05 to about 32 microns.
Claim 2
Dependent Claim
54 words
An electrically conductive elastomeric ink composition which comprises an elastomeric silicone binder and finely divided nickel particles interspersed therein in an amount from about 25 to about 90 percent by weight based on the weight of the composition, the nickel particles having a size in the range from about 0.05 to about 32 microns.
Claim 3
Dependent Claim
21 words
The ink of claim 1 whereinthe nickel particles have a size in the range from about 0.1 to about 10 microns.
Claim 4
Dependent Claim
22 words
The ink of claim 1 wherein the nickel particles have a size in the range from about 0.1 to about 1.0 micron.
Claim 5
Dependent Claim
64 words
An electrically conductive elastomeric ink composition comprising an addition cured silicone binder and finely divided nickel particles interspersed therein in an amount from about 25 to about 90 percent by weight based on the weight of the composition, the nickel particles having a size in the range from about 0.1 to about 10 microns, the ink being self-adhered to a nonconductive printed circuit board.
Claim 6
Dependent Claim
64 words
An electrically conductive elastomeric ink composition comprising an addition cured silicone binder and finely divided nickel particles interspersed therein in an amount from about 25 to about 90 percent by weight based on the weight of the composition, the nickel particles having a size in the range from about 0.1 to about 10 microns, the ink being self-adhered to a nonconductive printed circuit board.
Claim 7
Dependent Claim
22 words
The ink of claim 4 wherein the addition cured silicone binder is formed as a solution by the addition of a solvent.
Claim 8
Dependent Claim
13 words
The ink of claim 5 wherein the solvent is a high hydrocarbon solvent.
Claim 9
Dependent Claim
11 words
The ink of claim 6 wherein the solvent is a xylene.
Claim 10
Dependent Claim
26 words
A printed circuit board comprising conductive traces and contacts, at least one of said traces or contacts being comprised of the ink composition of claim 1.
Claim 11
Dependent Claim
18 words
The printed circuit board of claim 8 wherein the nickel particles are coated on a carbonaceous particulate substrate.
Claim 12
Dependent Claim
14 words
The printed circuit board of claim 9 wherein the substrate is comprised of graphite.
Claim 13
Dependent Claim
42 words
The printed circuit board of claim 9 wherein the binder is formed of an addition cured elastomeric silicone which has undergone linear shrinkage of at least about 3 percent during cure, and the ink composition is self-adhered to the printed circuit board.
Claim 14
Dependent Claim
42 words
The printed circuit board of claim 9 wherein the binder is formed of an addition cured elastomeric silicone, which has undergone linear shrinkage of at least about 6 percent during cure, and the ink composition being self-adhered to the printed circuit board.
Claim 15
Dependent Claim
43 words
The printed circuit board of claim 9 wherein a high hydrocarbon solvent is added to the reactive components of the binder prior to addition cure in sufficient quantities so that the solution has a viscosity of form about 50 to about 500 centipoise.
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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) | 1990-01-05 | 1990-07-07 | 1991-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-05 | 1994-07-07 | 1995-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-05 | 1998-07-07 | 1999-01-06 | $7700.00 | Window Closed / Lapsed |