US3401104A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrochemical machining process and electrolyte composition of chlorides and phosphates
Assignee: Motors Liquidation Co
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Filing: 1965-10-23
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Granted: 1968-09-10
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Expires: 1985-10-23
Abstract
No abstract record available.
Inventors
- 👤 Boda Mitchell A La
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:29
CPC Classifications
B; B23; B23H; B23H3/00; B23H3/08; C; C25; C25F; C25F3/00; C25F3/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
120 words
A PROCESS FOR ELECTROCHEMICALLY MACHINING A METAL COMPRISING THE STEPS OF ESTABLISHING SAID METAL AS THE ANODE IN AN ELECTROCHEMIAL CELL, ORIENTING AN ELECTRODE ADJACENT TO BUT CLOSELY SPACED FROM SAID METAL TO FORM A GAP THEREBETWEEN, FLOWING THROUGH SAID GAP AN AQUEOUS ELECTROLYTE CONSISTING ESSENTIALLY OF A MIXTURE OF ALKALI METAL CHLORIDES AND PHOSPHATES, WHEREIN THE CONCENTRATION OF SAID PHOSPHATE ION IS FROM 0.002 TO 0.10 EQUIVALENT OF PHOSPHATE ION PER EQUIVALENT OF CHLORIDE ION WHICH FORM AN ELECTROCHEMICAL EROSION INHIBITING FILM ON THE SURFACE OF THE METAL WHICH FILM DECOMPOSES AT HIGH CURRENT DENSITIES, AND PASSING CURRENT THROUGH SAID METAL, ELECTROLYTE AND ELECTRODE TO DECOMPOSE SAID FILM IN SELECTED AREAS WHEREBY ELECTROCHEMICAL MACHINING CAN CONTINUE IN SAID AREAS.
References Cited (Backward Citations)
US3058895A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-10 | 1972-03-11 | 1972-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-10 | 1976-03-11 | 1976-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-10 | 1980-03-11 | 1980-09-10 | $7700.00 | Window Closed / Lapsed |