Patent US3714018A successfully refreshed from Google Patents.
US3714018A
Expired / Lapsed
US
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Electrode for electrochemical drilling
Assignee: RTX Corp
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Filing: 1971-04-05
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Granted: 1973-01-30
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Expires: 1991-04-05
Abstract
Abstract An electrode for electrochemically drilling small diameter holes in which the electrode has a notch closely spaced from the tip with the dielectric coating on the electrode terminating in the notch and with the tip and notch specially shaped to prevent the action of the electrolyte during drilling from peeling off the coating.
Inventors
- 👤 R Shaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:51
CPC Classifications
B; B23; B23H; B23H9/00; B23H9/14
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) | 1976-01-30 | 1976-07-31 | 1977-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-30 | 1980-07-31 | 1981-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-30 | 1984-07-31 | 1985-01-30 | $7700.00 | Window Closed / Lapsed |