Patent US3753795A successfully refreshed from Google Patents.
US3753795A
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Spark plug electrode
Assignee: Westinghouse Electric Corp
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Filing: 1971-08-02
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Granted: 1973-08-21
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Expires: 1991-08-02
Abstract
Abstract A spark plug electrode is made of a dispersion-strengthened nickel alloy containing small amounts of aluminum and, optionally, chromium.
Inventors
- 👤 J Weber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:06
CPC Classifications
H; H01; H01T; H01T13/00; H01T13/20; H01T13/39
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
81 words
A spark plug electrode in accordance with claim 1 wherein the dispersoid is a refractory oxide selected from the group consisting of yttria, Rare Earth oxides, ceria and thoria in an amount of about 0.3 percent to about 2.5 percent, by volume, said alloy being characterized in that when the volume of refractory dispersoid is within the range of 1.25 to 2.25 percent, the aluminum and chromium are controlled so as not to exceed about 0.75 percent and 1.5 percent, respectively.
Claim 2
Dependent Claim
32 words
A spark plug electrode in accordance with claim 2 wherein the alloy is produced by mechanical alloying and the said dispersoid has a particle size of about 100 to about 1000 Angstroms.
Claim 3
Dependent Claim
40 words
A spark plug electrode in accordance with claim 2 wherein the alloy contains about 0.1 percent to about 1.5 percent aluminum, up to about 4 percent chromium, and about 0.4 volume percent to about 1 volume percent of yttria dispersoid.
Claim 4
Dependent Claim
102 words
An oxide dispersion-strengthened corrosion resistant nickel-base alloy characterized by a good combination of (a) spark erosion resistance, (b) high thermal condictivity, (c) oxidation resistance under cyclic conditions and (d) cold drawability, said alloy consisting essentially of, by weight, aluminum in an amount of about 0.1 percent with the upper limit not exceeding about 2.5 percent for purposes of good cold drawability, up to about 6 percent chromium, up to about 0.5 percent titanium, up to about 0.1 percent carbon, up to about 1 percent of a metal from ghe group consisting of yttrium and Rare Earth metal and the balance essentially nickel.
Claim 5
Dependent Claim
78 words
An alloy according to claim 5 wherein the dispersoid is a refractory oxide selected from the group consisting of yttria, Rare Earth oxides, ceria and thoria in an amount of about 0.3 percent to about 2.5 percent, by volume, said alloy being characterized in that when the volume of refractory dispersoid is within the range of 1.25 to 2.25 percent, the aluminum and chromium are controlled so as not to exceed about 0.75 percent and 1.5 percent, respectively.
Claim 6
Dependent Claim
29 words
An alloy according to claim 6 wherein the alloy is produced by mechanical alloying and the said dispersoid has a particle size of about 100 to about 1000 Angstroms.
Claim 7
Dependent Claim
37 words
An alloy according to claim 6 wherein the alloy contains about 0.1 percent to about 1.5 percent aluminum, up to about 4 percent chromium, and about 0.4 volume percent to about 1 volume percent of yttria dispersoid.
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) | 1976-08-20 | 1977-02-19 | 1977-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-20 | 1981-02-19 | 1981-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-20 | 1985-02-19 | 1985-08-21 | $7700.00 | Window Closed / Lapsed |