US3401103A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrochemical machining process and electrolyte composition of chloride and sulfates
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
- 👤 Alexander H Joyce
- 👤 Lawrence V Puls
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:01
CPC Classifications
B; B23; B23H; B23H3/00; B23H3/08; C; C25; C25F; C25F3/00; C25F3/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
A PROCESS FOR ELECTROCHEMICALLY MACHINING A METAL CONSISTING ESSENTIALLY OF THE STEPS OF ESTABLISHING SAID METAL AS THE ANODE IN AN ELECTROCHEMICAL CELL, ORIENTING A CATHODIC ELECTRODE ADJACENT TO BUT CLOSELY SPACED FROM SAID METAL SO AS TO FORM A GAP THEREBETWEEN, FLOWING THROUGH SAID GAP AN AQUEOUS ELECTROLYTE CONSISTING ESSENTIALLY OF A BALANCED MIXTURE OF IONIZING SALTS OF CHLORIDES, SULFATES AND NITRATES WHICH ERODE THE GRAINS AND GRAIN BOUNDARIES OF SAID METAL AT A UNIFORM RATE, AND PASSING CURRENT THROUGH SAID METAL, ELECTROLYTE AND ELECTRODE, WHEREBY THE SURFACE OF SAID METAL IS UNIFORMLY ELECTROLYTICALLY ERODED, WHEREIN THE CONCENTRATION OF SAID SULFATE IS FROM 0.20 TO 3.0 EQUIVALENTS OF SULFATE PER EQUIVALENT OF CHLORIDE AND THE CONCENTRATION OF SAID NITRATE IF FROM 0.1 TO 0.40 EQUIVALENT TO NITRATE PER EQUIVALENT OF CHLORIDE.
Claim 2
Dependent Claim
132 words
A PROCESS FOR ELECTROCHEMICALLY MACHINING A METAL CONSISTING ESSENTIALLY OF THE STEPS OF ESTABLISHING SAID METAL AS THE ANODE IN AN ELECTROCHEMICAL CELL, ORIENTING A CATHODIC ELECTRODE ADJACENT TO BUT CLOSELY SPACED FROM SAID METAL SO AS TO FORM A GAP THEREBETWEEN, FLOWING THROUGH SAID GAP AN AQUEOUS ELECTROLYTE CONSISTING ESSENTIALLY OF A BALANCED MIXTURE OF IONIZING SALTS OF CHLORIDES, SULFATES AND NITRATES WHICH ERODE THE GRAINS AND GRAIN BOUNDARIES OF SAID METAL AT A UNIFORM RATE, AND PASSING CURRENT THROUGH SAID METAL, ELECTROLYTE AND ELECTRODE, WHEREBY THE SURFACE OF SAID METAL IS UNIFORMLY ELECTROLYTICALLY ERODED, WHEREIN THE CONCENTRATION OF SAID SULFATE IS FROM 0.20 TO 3.0 EQUIVALENTS OF SULFATE PER EQUIVALENT OF CHLORIDE AND THE CONCENTRATION OF SAID NITRATE IF FROM 0.1 TO 0.40 EQUIVALENT TO NITRATE PER EQUIVALENT OF CHLORIDE.
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) | 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 |