Patent US5500304A successfully refreshed from Google Patents.
US5500304A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silver-nickel composite material for electrical contacts and electrodes
Assignee: BERU RUPRECHT GmbH and Co KG
•
Filing: 1995-02-23
•
Granted: 1996-03-19
•
Expires: 2015-02-23
Abstract
Abstract Silver-nickel composite for electrical contacts and electrodes, particularly intended for spark plug electrodes. In order to prevent corrosive attack to the nickel components, the silver component consists of a silver alloy which is impervious to oxygen, and the nickel component is comprised of nickel or of a nickel alloy. This facilitates the manufacture of contacts and electrodes which have a long service life.
Inventors
- 👤 Otto Loffler
- 👤 Werner Niessner
- 👤 Heinz Ambacher
- 👤 Friedrich E. Schneider
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:43
CPC Classifications
H; H01; H01T; H01T13/00; H01T13/20; H01T13/39; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12486
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
93 words
Silver-nickel composite material for spark plug electrodes, where silver components of the composite material consist of an oxygen impervious silver alloy and nickel components of the composite material are comprised of nickel or a nickel alloy; wherein the nickel components are formed of nickel or nickel alloy tubes filled with a material which lowers the threshold voltage, said tubes having been finished so as to result in the nickel being present in the composite as a thin fiber, 100-6,000 nickel fibers per mm 2 being incorporated into a matrix of the silver alloy.
Claim 2
Dependent Claim
93 words
Silver-nickel composite material for spark plug electrodes, where silver components of the composite material consist of an oxygen impervious silver alloy and nickel components of the composite material are comprised of nickel or a nickel alloy; wherein the nickel components are formed of nickel or nickel alloy tubes filled with a material which lowers the threshold voltage, said tubes having been finished so as to result in the nickel being present in the composite as a thin fiber, 100-6,000 nickel fibers per mm 2 being incorporated into a matrix of the silver alloy.
Claim 3
Dependent Claim
12 words
Composite material according to claim 1, wherein the silver alloy contains silicon.
Claim 4
Dependent Claim
16 words
Composite material according to claim 2, the silver alloy comprises 0.05-0.3 percent by weight of silicon.
Claim 5
Dependent Claim
12 words
Composite material according to claim 1, wherein the silver alloy contains tin.
Claim 6
Dependent Claim
18 words
Composite material according to claim 4, wherein the silver alloy contains more than 2% by weight of tin.
References Cited (Backward Citations)
US1720894A
Cited
US1970318A
Cited
US2052143A
Cited
US2154068A
Cited
US3738920A
Cited
DE2250810A1
Cited
DE2259636A1
Cited
US4112905A
Cited
DE2508490A1
Cited
US4093887A
Cited
GB2057498A
Cited
DE3213481A1
Cited
JPS61130446A
Cited
DE3918278A1
Cited
EP0401598A1
Cited
US5107169A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-03-19 | 1999-09-18 | 2000-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-03-19 | 2003-09-18 | 2004-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-03-19 | 2007-09-18 | 2008-03-19 | $7700.00 | Window Closed / Lapsed |