Patent US2574305A successfully refreshed from Google Patents.
US2574305A
Expired / Lapsed
US
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Activating process for plating
Assignee: Motors Liquidation Co
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Filing: 1948-09-22
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Granted: 1951-11-06
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Expires: 1968-09-22
Abstract
No abstract record available.
Inventors
- 👤 Robert M Wagner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:12
CPC Classifications
C; C25; C25D; C25D5/00; C25D5/34; C25D5/38; C25D5/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
A PROCESS OF ACTIVATING A METALLIC PART HAVING A PLATING OF CHROMIUM THEREON SO THAT AN ADHERENT, METALLIC COATING MAY BE ELECTRODEPOSITED THEREOVER WHICH CONSISTS ESSENTIALLY IN MAKING THE CHROMIUM PLATED PART THE CATHODE IN A SOLUTION CONSISTING ESSENTIALLY OF 6 TO 32 OUNCES OF NICKEL SULFATE AND 6 TO 32 FLUID OUNCES OF COMMERCIAL CONCENTRATED HYDROCHLORIC ACID PER GALLON OF WATER, AND PASSING DIRECT CURRENT FROM A NICKEL ANODE THROUGH SAID SOLUTION TO THE CHROMIUM PLATED PART AT A CATHODIC CURRENT DENSITY WITHIN THE RANGE OF 15 TO 150 AMPERES PER SQUARE FOOT FOR A TIME WITHIN THE RANGE OF APPROXIMATELY 10 TO 30 SECONDS, SAID SOLUTION HAVING A TEMPERATURE WITHIN THE RANGE OF APPROXIMATELY 70* F. TO 125* F.
Claim 2
Dependent Claim
121 words
A PROCESS OF ACTIVATING A METALLIC PART HAVING A PLATING OF CHROMIUM THEREON SO THAT AN ADHERENT, METALLIC COATING MAY BE ELECTRODEPOSITED THEREOVER WHICH CONSISTS ESSENTIALLY IN MAKING THE CHROMIUM PLATED PART THE CATHODE IN A SOLUTION CONSISTING ESSENTIALLY OF 6 TO 32 OUNCES OF NICKEL SULFATE AND 6 TO 32 FLUID OUNCES OF COMMERCIAL CONCENTRATED HYDROCHLORIC ACID PER GALLON OF WATER, AND PASSING DIRECT CURRENT FROM A NICKEL ANODE THROUGH SAID SOLUTION TO THE CHROMIUM PLATED PART AT A CATHODIC CURRENT DENSITY WITHIN THE RANGE OF 15 TO 150 AMPERES PER SQUARE FOOT FOR A TIME WITHIN THE RANGE OF APPROXIMATELY 10 TO 30 SECONDS, SAID SOLUTION HAVING A TEMPERATURE WITHIN THE RANGE OF APPROXIMATELY 70* F. TO 125* F.
References Cited (Backward Citations)
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US2118956A
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US2285548A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-11-05 | 1955-05-07 | 1955-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-05 | 1959-05-07 | 1959-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-05 | 1963-05-07 | 1963-11-06 | $7700.00 | Window Closed / Lapsed |