Patent US4673790A successfully refreshed from Google Patents.
US4673790A
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Copper based wire electrode for wire electro-discharge machining
Assignee: Sumitomo Electric Industries Ltd
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Filing: 1985-05-23
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Granted: 1987-06-16
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Expires: 2005-05-23
Abstract
Abstract A wire electrode for use in electro-discharge machining is formed essentially of Cu, including Zn of 5 through 38% by weight and Si of 0.1 through 0.5% by weight so as to suppress sputtering of the electrode material to the workpiece and to improve workability. The wire electrode may include Zn of 30 through 40% by weight, Si of 0.1 through 1.2% by weight and Al of 0.01 through 0.2% by weight in addition to Cu.
Inventors
- 👤 Kazuo Sawada
- 👤 Satoshi Takano
- 👤 Shigeo Ezaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:49
CPC Classifications
B; B23; B23H; B23H7/00; B23H7/02; B23H7/08
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
29 words
A wire electrode for use in an electro-discharge machining consisting of Zn of 5 through 38% by weight, Si of 0.1 through 0.5% by weight, and the remainder Cu.
Claim 2
Dependent Claim
29 words
A wire electrode for use in an electro-discharge machining consisting of Zn of 5 through 38% by weight, Si of 0.1 through 0.5% by weight, and the remainder Cu.
Claim 3
Dependent Claim
36 words
A wire electrode for use in an electro-discharge machining consisting of Zn of 30 through 40% by weight, Si of 0.1 through 1.2% by weight, Al of 0.01 through 0.18% by weight, and the remainder Cu.
Claim 4
Dependent Claim
36 words
A wire electrode for use in an electro-discharge machining consisting of Zn of 30 through 40% by weight, Si of 0.1 through 1.2% by weight, Al of 0.01 through 0.18% by weight, and the remainder Cu.
Claim 5
Dependent Claim
64 words
A wire electrode for use in an electro-discharge machining consisting of Zn of 30 through 40% by weight, Si of 0.1 through 1.2% by weight, Al of 0.01 through 0.18% by weight, and one or two components selected from a group consisting of Ga, In, Sn, Mg, Zr and Y with the total amount of 0.05 through 0.5% by weight, and the remainder Cu.
Claim 6
Dependent Claim
64 words
A wire electrode for use in an electro-discharge machining consisting of Zn of 30 through 40% by weight, Si of 0.1 through 1.2% by weight, Al of 0.01 through 0.18% by weight, and one or two components selected from a group consisting of Ga, In, Sn, Mg, Zr and Y with the total amount of 0.05 through 0.5% by weight, and the remainder Cu.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-06-15 | 1990-12-15 | 1991-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-15 | 1994-12-15 | 1995-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-15 | 1998-12-15 | 1999-06-16 | $7700.00 | Window Closed / Lapsed |