Patent US2836552A successfully refreshed from Google Patents.
US2836552A
Expired / Lapsed
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Treatment of nickel for electroplating chromium thereon
Assignee: Motors Liquidation Co
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Filing: 1955-10-06
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Granted: 1958-05-27
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Expires: 1975-10-06
Abstract
No abstract record available.
Inventors
- 👤 James D Patrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:44
CPC Classifications
C; C25; C25D; C25D5/00; C25D5/34; C25D5/38; C25D5/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
A METHOD OF ACTIVATING A SURFACE OF NICKEL FOR THE ELECTRODEPOSITION OF CHROMIUM THEREON WHICH COMPRISES PROVIDING AN AQUEOUS SOLUTION CONSISTING ESSENTIALLY OF CHROMIC ACID WITHIN THE RANGE OF 2 TO 6 OUNCES PER GALLON AND SULFATE WITHIN THE RANGE OF .05 TO .30 OUNCE PER GALLON, IMMERSING THE NICKEL IN SAID SOLUTION, SAID SOLUTION BEING AT A TEMPERATURE WITHIN THE RANGE OF ABOUT 60* TO 160*F., AND PASSING AN ELECTRIC CURRENT THROUGH SAID SOLUTION WITH THE NICKEL AS THE CATHODE AT A CURRENT DENSITY OF ABOUT 2 TO 12 AMPERES PER SQUARE FOOT FOR A TIME WITHIN THE RANGE OF ABOUT 30 SECONDS TO THREE MINUTES.
Claim 2
Independent Claim
107 words
A METHOD OF ACTIVATING A SURFACE OF NICKEL FOR THE ELECTRODEPOSITION OF CHROMIUM THEREON WHICH COMPRISES PROVIDING AN AQUEOUS SOLUTION CONSISTING ESSENTIALLY OF CHROMIC ACID WITHIN THE RANGE OF 2 TO 6 OUNCES PER GALLON AND SULFATE WITHIN THE RANGE OF .05 TO .30 OUNCE PER GALLON, IMMERSING THE NICKEL IN SAID SOLUTION, SAID SOLUTION BEING AT A TEMPERATURE WITHIN THE RANGE OF ABOUT 60* TO 160*F., AND PASSING AN ELECTRIC CURRENT THROUGH SAID SOLUTION WITH THE NICKEL AS THE CATHODE AT A CURRENT DENSITY OF ABOUT 2 TO 12 AMPERES PER SQUARE FOOT FOR A TIME WITHIN THE RANGE OF ABOUT 30 SECONDS TO THREE MINUTES.
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) | 1961-05-26 | 1961-11-25 | 1962-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-26 | 1965-11-25 | 1966-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-26 | 1969-11-25 | 1970-05-27 | $7700.00 | Window Closed / Lapsed |