US3756937A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for an electrochemical milling process
Assignee: Individual
•
Filing: 1971-06-24
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Granted: 1973-09-04
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Expires: 1991-06-24
Abstract
Abstract A PROCESS AND APPARATUS FOR THE SELECTIVE REMOVAL OF METAL FROM A CORROSION RESISTANT METAL PIECE BY ELECTROCHEMICAL MILLING BY COVERING THE PIECE WITH AN ALUMINUM OR TITANIUM ELECTRICALLY CONDUCTIVE MASK WHICH IS PROVIDED WITH A PROTECTIVE SURFACE THROUGH ANODIZATION DUR- ING THE PROCESS, THE NON-MASKED, ETCHED SURFACES OF THE METAL PIECE BEING ELECTROCHEMICALLY DISSOLVED TO A PREDETERMINED DEPTH.
Inventors
- 👤 J Lucas
- 👤 J Zuryk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:51
CPC Classifications
C; C25; C25F; C25F3/00; C25F3/02; C25F3/06; B; B23; B23H; B23H9/00; B23H9/06; C25F3/14
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) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |