Patent US4458969A successfully refreshed from Google Patents.
US4458969A
Expired / Lapsed
US
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Membrane switch with means for preventing silver migration
Assignee: DORMAN BOGDONOFF CORP
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Filing: 1982-12-06
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Granted: 1984-07-10
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Expires: 2002-12-06
Abstract
Abstract In a membrane switch having at least one silver conductive lead terminating at a termination point for connection to an electrical connector, the improvement comprising a strip of non-migrating, conductive material applied over said conductive lead at least in a region adjacent to said termination point and extending a distance beyond the termination point of said conductive lead for receipt of said electrical connector affixed to and in electrical contact with said strip of non-migrating, conductive material at the extended portion thereof.
Inventors
- 👤 Gregory Demeo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:12
CPC Classifications
H; H01; H01H; H01H13/00; H01H13/70; H01H13/78; H01H13/785; H01H13/702; H05; H05K; H05K1/00; H05K1/02; H05K1/09; H05K1/092; H05K1/095; H01H2201/00; H01H2201/022; H01H2201/03; H01H2203/00; H01H2203/034; H01H2207/00; H01H2207/004; H01H2227/00; H01H2227/002; H01H2229/00; H01H2229/024; H01H2229/028; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49105
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
77 words
In a membrane switch having at least one silver conductive lead terminating at a termination point for connection to an electrical connector, the improvement comprising a strip of a non-migrating, conductive material applied over said lead at least in a region adjacent to said termination point and extending a distance beyond the termination point of said lead for receipt of said electrical connector affixed to and in electrical contact with said strip at the extended portion thereof.
Claim 2
Dependent Claim
77 words
In a membrane switch having at least one silver conductive lead terminating at a termination point for connection to an electrical connector, the improvement comprising a strip of a non-migrating, conductive material applied over said lead at least in a region adjacent to said termination point and extending a distance beyond the termination point of said lead for receipt of said electrical connector affixed to and in electrical contact with said strip at the extended portion thereof.
Claim 3
Dependent Claim
12 words
The switch of claim 1 wherein said non-migrating, conductive material comprises graphite.
Claim 4
Dependent Claim
18 words
The switch of claim 1 wherein said lead is carried on a flexible tail extending from said switch.
Claim 5
Dependent Claim
12 words
The switch of claim 3 wherein said non-migrating, conductive material comprises graphite.
Claim 6
Independent Claim
81 words
A method for preventing silver migration in the area in which the silver conductive leads of a membrane switch are attached to electrical connectors, said switch including at least one silver conductive lead terminating at a termination point, comprising: applying a strip of non-migrating, conductive material over said silver conductive lead at least in a region adjacent said termination point and extending a distance beyond said termination point; and affixing said electrical connector to said strip at the extended portion thereof.
Claim 7
Independent Claim
81 words
A method for preventing silver migration in the area in which the silver conductive leads of a membrane switch are attached to electrical connectors, said switch including at least one silver conductive lead terminating at a termination point, comprising: applying a strip of non-migrating, conductive material over said silver conductive lead at least in a region adjacent said termination point and extending a distance beyond said termination point; and affixing said electrical connector to said strip at the extended portion thereof.
Claim 8
Dependent Claim
12 words
The method of claim 5, wherein said non-migrating conductive material comprises graphite.
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) | 1987-07-10 | 1988-01-09 | 1988-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-10 | 1992-01-09 | 1992-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-10 | 1996-01-09 | 1996-07-10 | $7700.00 | Window Closed / Lapsed |