US3696014A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic drilling
Assignee: Rolls Royce PLC
•
Filing: 1970-04-27
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Granted: 1972-10-03
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Expires: 1990-04-27
Abstract
Abstract ELECTROLYTIC DRILLING WHEREIN THE ELECTRODE IS CONTINUOUSLY ROTATED RELATIVELY TO THE WORKPIECE, AND LATERAL PRESSING CONTACT IS CONTINUOUSLY MAINTAINED BETWEEN A PREDETEMINED SIDE ONLY OF AN INSULATED PART OF THE ELEC- TRODE, ADJACENT TO THE OPERATING PART, AND THE SIDE WALL OF THE HOLE.
Inventors
- 👤 John Goodard
- 👤 John Francis Wilson
- 👤 Derek Aubrey Glew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:54
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) | 1975-10-03 | 1976-04-03 | 1976-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-03 | 1980-04-03 | 1980-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-03 | 1984-04-03 | 1984-10-03 | $7700.00 | Window Closed / Lapsed |