Patent US3868249A successfully refreshed from Google Patents.
US3868249A
Expired / Lapsed
US
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Alloy for electrical leads
Assignee: Wilkinson Dental Manufacturing Co Inc
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Filing: 1974-03-14
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Granted: 1975-02-25
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Expires: 1994-03-14
Abstract
Abstract A new alloy for electrical leads normally imbedded in a ceramic base constituting a portion of an electrical component such as a potentiometer, comprises, by weight, substantially 49 percent gold; 16 percent silver; 32.2 percent palladium; and, 1.8 percent ruthenium, the proportions being such as to provide a greatly improved non-brittle relatively less expensive lead wire in which oxidation is substantially avoided even at the firing temperatures of the ceramic base in which the lead is imbedded.
Inventors
- 👤 Jr Guy Darrell Hufford
- 👤 John Leland Teets
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:30
CPC Classifications
H; H01; H01B; H01B1/00; H01B1/02; C; C22; C22C; C22C5/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
49 words
AN ALLOY FOR ELECTRICAL LEADS FOR SECUREMENT IN A CERAMIC BASE STRUCTURE AND SUBJECT TO FIRING OF THE CERAMIC BASE COMPRISING BY WEIGHT, FROM 44 PERCENT TO 54 PERCENT GOLD 11 PERCENT TO 21 PERCENT SILVER, 27.2 PERCENT TO 37.2 PERCENT PALLADIUM, AND 0.8 PERCENT TO 2.8 PERCENT RUTHENIUM.
Claim 2
Dependent Claim
49 words
AN ALLOY FOR ELECTRICAL LEADS FOR SECUREMENT IN A CERAMIC BASE STRUCTURE AND SUBJECT TO FIRING OF THE CERAMIC BASE COMPRISING BY WEIGHT, FROM 44 PERCENT TO 54 PERCENT GOLD 11 PERCENT TO 21 PERCENT SILVER, 27.2 PERCENT TO 37.2 PERCENT PALLADIUM, AND 0.8 PERCENT TO 2.8 PERCENT RUTHENIUM.
Claim 3
Dependent Claim
38 words
An alloy for electrical leads for securement in a ceramic base structure and subject to firing of the ceramic base, consisting by weight of substantially 49 percent gold, 16 percent silver, 32.2 percent palladium, and 1.8 percent ruthenium.
Claim 4
Dependent Claim
38 words
An alloy for electrical leads for securement in a ceramic base structure and subject to firing of the ceramic base, consisting by weight of substantially 49 percent gold, 16 percent silver, 32.2 percent palladium, and 1.8 percent ruthenium.
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) | 1978-02-24 | 1978-08-26 | 1979-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-24 | 1982-08-26 | 1983-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-24 | 1986-08-26 | 1987-02-25 | $7700.00 | Window Closed / Lapsed |