US3558442A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroplating a ductile zinc-nickel alloy onto strip steel
Assignee: Wheeling Pittsburgh Steel Corp
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Filing: 1969-01-31
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Granted: 1971-01-26
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Expires: 1989-01-31
Abstract
Abstract A METHOD OF ELECTROPLATING A NICKEL-ZINC ALLOY ON A STEEL STRIP IS DESCRIBED, IN WHICH THE PLATING BATH IS MAINTAINED WITHIN A SELECTED PH RANGE, THROUGH USE OF A PRESELECTED RATIO OF NICKEL TO ZINC IN THE BATH, AND A PRESELECTED PLATING CURRENT DENSITY, WHEREBY AN ELECTROPLATED COATING IS FORMED HAVING A NICKEL CONTENT OF FROM 9.5 TO 12.5%, WHICH COATING HAS A LOW INTERNAL STRESS, AND INCREASED RESISTANCE TO CORROSION.
Inventors
- 👤 Edward J Roehl
- 👤 Robert H Dillon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:30
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/56; C25D3/565
Claims Analysis
Total Claims: 0
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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) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |