Patent US3088889A successfully refreshed from Google Patents.
US3088889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic machining of metal surfaces
Assignee: Motors Liquidation Co
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Filing: 1959-06-08
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Granted: 1963-05-07
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Expires: 1979-06-08
Abstract
No abstract record available.
Inventors
- 👤 Boda Mitchell A La
- 👤 Charles R Wiese
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:45
CPC Classifications
C; C25; C25F; C25F3/00; C25F3/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
THE METHOD OF ELECTROLYTICALLY MACHINING A METAL FROM THE CLASS CONSISTING OF STAINLESS STEEL, NICKEL BASE ALLOY AND COBALT BASE ALLOYS, SAID METHOD COMPRISING MAKING THE METAL AN ANODE IN AN AQUEOUS SOLUTION CONSISTING ESSENTIALLY OF WATER, AMMONIUM IONS, FLUORIDE IONS AND HYDROGEN IONS, SAID AMMONIUM, FLUORIDE AND HYDROGEN IONS BEING IN THE RESPECTIVE CONCENTRATIONS GENERALLY CORRESPONDING TO THAT PRODUCED BY DISSOLVING ABOUT 20-200 GRAMS AMMONIUM BIFLUORIDE IN ONE LITER OF WATER, PROVIDING A SUITABLE CATHODE AND PASSING ELECTRICAL CURRENT THROUGH THE RESULTING CELL SO AS TO INDUCE ON SAID METAL AN ANODIC CURRENT DENSITY OF AT LEAST ABOUT 750 AMPERES PER SQUARE FOOT.
Claim 2
Independent Claim
104 words
THE METHOD OF ELECTROLYTICALLY MACHINING A METAL FROM THE CLASS CONSISTING OF STAINLESS STEEL, NICKEL BASE ALLOY AND COBALT BASE ALLOYS, SAID METHOD COMPRISING MAKING THE METAL AN ANODE IN AN AQUEOUS SOLUTION CONSISTING ESSENTIALLY OF WATER, AMMONIUM IONS, FLUORIDE IONS AND HYDROGEN IONS, SAID AMMONIUM, FLUORIDE AND HYDROGEN IONS BEING IN THE RESPECTIVE CONCENTRATIONS GENERALLY CORRESPONDING TO THAT PRODUCED BY DISSOLVING ABOUT 20-200 GRAMS AMMONIUM BIFLUORIDE IN ONE LITER OF WATER, PROVIDING A SUITABLE CATHODE AND PASSING ELECTRICAL CURRENT THROUGH THE RESULTING CELL SO AS TO INDUCE ON SAID METAL AN ANODIC CURRENT DENSITY OF AT LEAST ABOUT 750 AMPERES PER SQUARE FOOT.
References Cited (Backward Citations)
GB294237A
Cited
GB530041A
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GB556797A
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US2457060A
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US2742416A
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US2625468A
Cited
US2766199A
Cited
US2719781A
Cited
US2904479A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-05-06 | 1966-11-05 | 1967-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-06 | 1970-11-05 | 1971-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-06 | 1974-11-05 | 1975-05-07 | $7700.00 | Window Closed / Lapsed |