US2728720A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing an electroplate of nickel on magnesium and the magnesium-base alloys
Assignee: Dow Chemical Co
•
Filing: 1953-03-09
•
Granted: 1955-12-27
•
Expires: 1973-03-09
Abstract
No abstract record available.
Inventors
- 👤 Long Herbert K De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:00
CPC Classifications
C; C25; C25D; C25D5/00; C25D5/34; C25D5/42; C25D3/00; C25D3/02; C25D3/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
THE METHOD OF PRODUCING SOFT DUCTILE ELECTROPLATES OF NICKEL ON ARTICLES OF MAGNESIUM AND THE MAGNESIUMBASE ALLOYS WHICH COMPRISES SUBJECTING THE ARTICLES TO THE DEFILMING ACTION OF A DILUTE ACIDULATED AQUEOUS SOLUTION OF A FLUORIDE SELECTED FROM THE GROUP CONSISTING OF HYDROGEN FLUORIDE, AMMONIUM BIFLUORIDE, SODIUM BIFLUORIDE, POTASSIUM BIFLUORIDE, RINSING THE DEFILMED ARTICLES IN WATER, AND WITHOUT DRYING THE RINSED ARTICLES ELECTROLYZING THE ARTICLES AS CATHODES IN AN ELECTROPLTING BATH CONSISTING OF AN AQUEOUS SOLUTION CONTAINING NICKEL BIFLUORIDE AND HYDROGEN FLUORIDE, SAID SOLUTION HAVING A PH OF 1 TO 3 AND CONTAINING PER LITER OF THE SOLUTION 10 TO 50 GRAMS OF AN ORGANIC POLYBASIC ACID COMPOUND SELECTED FROM THE GROUP CONSISTING OF CITRIC ACID, TARTARIC ACID, AND THE ALKALI EARTH METAL SALTS OF THESE ACIDS.
Claim 2
Independent Claim
126 words
THE METHOD OF PRODUCING SOFT DUCTILE ELECTROPLATES OF NICKEL ON ARTICLES OF MAGNESIUM AND THE MAGNESIUMBASE ALLOYS WHICH COMPRISES SUBJECTING THE ARTICLES TO THE DEFILMING ACTION OF A DILUTE ACIDULATED AQUEOUS SOLUTION OF A FLUORIDE SELECTED FROM THE GROUP CONSISTING OF HYDROGEN FLUORIDE, AMMONIUM BIFLUORIDE, SODIUM BIFLUORIDE, POTASSIUM BIFLUORIDE, RINSING THE DEFILMED ARTICLES IN WATER, AND WITHOUT DRYING THE RINSED ARTICLES ELECTROLYZING THE ARTICLES AS CATHODES IN AN ELECTROPLTING BATH CONSISTING OF AN AQUEOUS SOLUTION CONTAINING NICKEL BIFLUORIDE AND HYDROGEN FLUORIDE, SAID SOLUTION HAVING A PH OF 1 TO 3 AND CONTAINING PER LITER OF THE SOLUTION 10 TO 50 GRAMS OF AN ORGANIC POLYBASIC ACID COMPOUND SELECTED FROM THE GROUP CONSISTING OF CITRIC ACID, TARTARIC ACID, AND THE ALKALI EARTH METAL SALTS OF THESE ACIDS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-26 | 1959-06-27 | 1959-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-26 | 1963-06-27 | 1963-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-26 | 1967-06-27 | 1967-12-27 | $7700.00 | Window Closed / Lapsed |