US4439284A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition control of electrodeposited nickel-cobalt alloys
Assignee: Boeing North American Inc
•
Filing: 1980-06-17
•
Granted: 1984-03-27
•
Expires: 2000-06-17
Abstract
Abstract A process for the preparation of electrodeposited nickel-cobalt comprises immersing an anode and a cathode into an electrolyte solution comprising a predetermined Ni ++ /Co ++ ratio, passing a current from the anode to the cathode, and agitating the electrolytic solution in the area of the cathodic surface so as to prevent cathodic starvation and thereby eliminate the independent variables of current density and agitation.
Inventors
- 👤 Robert J. Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 02:28
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/56; C25D3/562; C25D21/00; C25D21/10
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
114 words
A process for controlling the composition of electrodeposited nickel-cobalt, EDNi-Co, comprises the steps of: immersing an anode comprising at least one non-reactive basket containing nickel, and at least one non-reactive basket containing cobalt, and a cathodic substrate into an electrolyte having a predetermined Ni ++ /Co ++ ratio; controlling said predetermined electrolyte Ni ++ /Co ++ ratio constant by passing a current from said nickel anode to said cathodic substrate through a first power source or rectifier and by passing a current from said cobalt anode to said cathodic substrate through a second power source or rectifier: and agitating the electrolyte in the vicinity of said cathodic substrate above the cathodic starvation agitation level.
Claim 2
Dependent Claim
114 words
A process for controlling the composition of electrodeposited nickel-cobalt, EDNi-Co, comprises the steps of: immersing an anode comprising at least one non-reactive basket containing nickel, and at least one non-reactive basket containing cobalt, and a cathodic substrate into an electrolyte having a predetermined Ni ++ /Co ++ ratio; controlling said predetermined electrolyte Ni ++ /Co ++ ratio constant by passing a current from said nickel anode to said cathodic substrate through a first power source or rectifier and by passing a current from said cobalt anode to said cathodic substrate through a second power source or rectifier: and agitating the electrolyte in the vicinity of said cathodic substrate above the cathodic starvation agitation level.
Claim 3
Dependent Claim
20 words
The process of claim 1 wherein said EDNi-Co has a cobalt range from about 35 to about 65 percent cobalt.
Claim 4
Dependent Claim
20 words
The process of claim 2 wherein said EDNi-Co has a cobalt range from about 40 to about 55 percent cobalt.
Claim 5
Dependent Claim
20 words
The process of claim 3 wherein said EDNi-Co has a cobalt range from about 45 to about 55 percent cobalt.
Claim 6
Dependent Claim
19 words
The process of claim 1 wherein said cathodic starvation agitation level is gpm/ft 2 ≧8.4×10 -3 (asf) 2 .
References Cited (Backward Citations)
US3300396A
Cited
US4062755A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-03-27 | 1987-09-26 | 1988-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-27 | 1991-09-26 | 1992-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-27 | 1995-09-26 | 1996-03-27 | $7700.00 | Window Closed / Lapsed |