US3440161A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic shaping apparatus
Assignee: Anocut Engineering Co
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Filing: 1966-07-25
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Granted: 1969-04-22
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Expires: 1986-07-25
Abstract
No abstract record available.
Inventors
- 👤 Lynn A Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:59
CPC Classifications
C; C25; C25F; C25F3/00; C25F3/16; B; B23; B23H; B23H9/00; B23H9/14; C25F7/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
IN AN ELECTROLYTIC APPARATUS FOR PIERCING A HOLE THROUGH AN ELECTRICALLY CONDUCTIVE AND ELECTROCHEMICALLY ERODIBLE WORKPIECE BY MEANS OF AN ELECTRODE HAVING AT LEAST ONE ELECTROLYTE PASSAGE THERETHROUGH AND A CONDUCTIVE WORKING FACE, MEANS FOR MOVING SAID ELECTRODE TOWARD AND AWAY FROM THE WORKPIECE TO DEFINE A NARROW WORK GAP BETWEEN THE WORKPIECE AND SAID ELECTRODE WORKING FACE, MEANS CONNECTED FOR PUMPING AN ELECTROLYTE TO AND
Claim 2
Dependent Claim
66 words
IN AN ELECTROLYTIC APPARATUS FOR PIERCING A HOLE THROUGH AN ELECTRICALLY CONDUCTIVE AND ELECTROCHEMICALLY ERODIBLE WORKPIECE BY MEANS OF AN ELECTRODE HAVING AT LEAST ONE ELECTROLYTE PASSAGE THERETHROUGH AND A CONDUCTIVE WORKING FACE, MEANS FOR MOVING SAID ELECTRODE TOWARD AND AWAY FROM THE WORKPIECE TO DEFINE A NARROW WORK GAP BETWEEN THE WORKPIECE AND SAID ELECTRODE WORKING FACE, MEANS CONNECTED FOR PUMPING AN ELECTROLYTE TO AND
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) | 1972-04-21 | 1972-10-21 | 1973-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-21 | 1976-10-21 | 1977-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-21 | 1980-10-21 | 1981-04-22 | $7700.00 | Window Closed / Lapsed |