Patent US2706171A successfully refreshed from Google Patents.
US2706171A
Expired / Lapsed
US
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Stripping chromium plating from zinc electrolytically
Assignee: MacDermid Enthone Inc
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Filing: 1953-03-09
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Granted: 1955-04-12
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Expires: 1973-03-09
Abstract
No abstract record available.
Inventors
- 👤 Raymond W Goral
- 👤 Goral Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:49
CPC Classifications
C; C25; C25F; C25F5/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
THE PROCESS OF ELECTROLYTICALLY STRIPPING OFF METAL PLATINGS OF THE GROUP CONSISTING OF CHROMIUM, NICKEL, COPPER AND MIXTURES THEREOF, FROM ARTICLES MADE OF ALLOYS CONSISTING PRINCIPALLY OF ZINC, WHICH INCLUDES THE STEPS OF: PREPARING A BATH CONSISTING ESSENTIALLY OF FROM 10% TO 30% PHOSPHORIC ACID BY WEIGHT, FROM 30% TO 55% SULFURIC ACID BY WEIGHT, CHROMIC ACID IN A CONCENTRATION FROM 0.1% BY WEIGHT TO SATURATION, AND THE BALANCE WATER; MAKING THE ARTICLES ANODES IN SAID BATH; AND SUBJECTING THE ARTICLES TO ELECTROLYTIC STRIPPING TO REMOVE ALL OF THE METAL PLATINGS THEREFROM AND TO FORM A PROTECTIVE FILM ON THE ZINC EFFECTIVELY PROTECTING THE ZINC FROM CORROSION DURING ITS IMMERSION IN SAID BATH.
Claim 2
Dependent Claim
113 words
THE PROCESS OF ELECTROLYTICALLY STRIPPING OFF METAL PLATINGS OF THE GROUP CONSISTING OF CHROMIUM, NICKEL, COPPER AND MIXTURES THEREOF, FROM ARTICLES MADE OF ALLOYS CONSISTING PRINCIPALLY OF ZINC, WHICH INCLUDES THE STEPS OF: PREPARING A BATH CONSISTING ESSENTIALLY OF FROM 10% TO 30% PHOSPHORIC ACID BY WEIGHT, FROM 30% TO 55% SULFURIC ACID BY WEIGHT, CHROMIC ACID IN A CONCENTRATION FROM 0.1% BY WEIGHT TO SATURATION, AND THE BALANCE WATER; MAKING THE ARTICLES ANODES IN SAID BATH; AND SUBJECTING THE ARTICLES TO ELECTROLYTIC STRIPPING TO REMOVE ALL OF THE METAL PLATINGS THEREFROM AND TO FORM A PROTECTIVE FILM ON THE ZINC EFFECTIVELY PROTECTING THE ZINC FROM CORROSION DURING ITS IMMERSION IN SAID BATH.
References Cited (Backward Citations)
US2418608A
Cited
US2578898A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-04-11 | 1958-10-11 | 1959-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-04-11 | 1962-10-11 | 1963-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-04-11 | 1966-10-11 | 1967-04-12 | $7700.00 | Window Closed / Lapsed |