US3594299A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for electrical machining of metallic workpieces
Assignee: Individual
•
Filing: 1968-08-30
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Granted: 1971-07-20
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Expires: 1988-08-30
Abstract
Abstract AN APPARATUS FOR ELECTRICALLY MACHINING A METALLIC WORKPIECE IN WHICH A FIRST SOURCE OF ELECTRIC CURRENT IS CONNECTED BETWEEN THE WORKPIECE AND THE TOOL ELECTRODE FOR ELECTROCHEMICAL EROSION AS THE WORKPIECE IS JUXTAPOSED WITH THE TOOL ELECTRODE AND IN CONTACT WITH AN ELECTROLYTE. A SECOND SOURCE OF ELECTRIC CURRENT APPLIES SPARK DISCHARGE PULSES IN ADDITION. D R A W I N G
Inventors
- 👤 Kiyoshi Inoue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:18
CPC Classifications
B; B23; B23H; B23H5/00; B23H5/02; B23H5/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-19 | 1975-01-18 | 1975-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-19 | 1979-01-18 | 1979-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-19 | 1983-01-18 | 1983-07-20 | $7700.00 | Window Closed / Lapsed |