US3585342A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Edm electrode
Assignee: Stackpole Carbon Co
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Filing: 1970-06-03
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Granted: 1971-06-15
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Expires: 1990-06-03
Abstract
Abstract Electrodes for EDM (electric discharge machining) of improved wear performance are provided by consolidated bodies of, by volume, 50 to 90 percent of graphite with the remainder consisting essentially of chromium-iron alloy containing from about one to about 99 volume percent of chromium.
Inventors
- 👤 John C Kosco
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:50
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/222; B23H; B23H1/00; B23H1/04; B23H1/06
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
35 words
An EDM electrode consisting essentially of a sintered body of, by volume, 50 to 80 percent of graphite and the remainder iron and chromium, the chromium constituting from 1 to 99 percent of the remainder.
Claim 2
Dependent Claim
35 words
An EDM electrode consisting essentially of a sintered body of, by volume, 50 to 80 percent of graphite and the remainder iron and chromium, the chromium constituting from 1 to 99 percent of the remainder.
Claim 3
Dependent Claim
29 words
Am EDM electrode according to claim 1, the body of the electrode containing chromium carbide reaction product of said chromium and said graphite formed during firing of the compact.
Claim 4
Dependent Claim
30 words
An EDM electrode consisting essentially of a sintered body of, by volume, 80 percent of graphite and the remainder about 90 percent of ion and about 10 percent of chromium.
Claim 5
Dependent Claim
30 words
An EDM electrode consisting essentially of a sintered body of, by volume, 80 percent of graphite and the remainder about 90 percent of ion and about 10 percent of chromium.
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) | 1974-06-14 | 1974-12-14 | 1975-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-14 | 1978-12-14 | 1979-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-14 | 1982-12-14 | 1983-06-15 | $7700.00 | Window Closed / Lapsed |