US3419481A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolyte and process for electroplating black chromium and article thereby produced
Assignee: Mcgean Rohco Inc
•
Filing: 1966-04-08
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Granted: 1968-12-31
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Expires: 1986-04-08
Abstract
No abstract record available.
Inventors
- 👤 Jr John B Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:31
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/04; C25D3/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
A COMPOUND OF MATTER FOR USE IN THE ELECTRO-DEPOSITION OF BLACK, CHROMIUM-CONTAINING DEPOSITS WHICH IS AN AQUEOUS SOLUTION CONSISTING ESSENTIALLY OF FROM ABOUT 60 GRAMS PER LITER TO SATURATION OF CHROMIX ANHYDRIDE, A FLUORIDE-CONTAINING CATALYST IN AN AMOUNT SUFFICIENT TO SUPPLY FROM ABOUT 0.03 TO ABOUT 1 GRAM OF FLUORIDE IN SOLUTION PER LITER, AN INORGANIC NITROGEN-CONTAINING COMPOUND IN AN AMOUNT SUFFICIENT TO SUPPLY THE EQUIVALENT OF FROM ABOUT 0.35 TO ABOUT 3.5 GRAMS OF (NO2) RADICAL PER LITER, SAID AQUEOUS SOLUTION BEING SUBSTANTIALLY COMPLETELY FREE OF SULFATE IONS.
Claim 2
Dependent Claim
89 words
A COMPOUND OF MATTER FOR USE IN THE ELECTRO-DEPOSITION OF BLACK, CHROMIUM-CONTAINING DEPOSITS WHICH IS AN AQUEOUS SOLUTION CONSISTING ESSENTIALLY OF FROM ABOUT 60 GRAMS PER LITER TO SATURATION OF CHROMIX ANHYDRIDE, A FLUORIDE-CONTAINING CATALYST IN AN AMOUNT SUFFICIENT TO SUPPLY FROM ABOUT 0.03 TO ABOUT 1 GRAM OF FLUORIDE IN SOLUTION PER LITER, AN INORGANIC NITROGEN-CONTAINING COMPOUND IN AN AMOUNT SUFFICIENT TO SUPPLY THE EQUIVALENT OF FROM ABOUT 0.35 TO ABOUT 3.5 GRAMS OF (NO2) RADICAL PER LITER, SAID AQUEOUS SOLUTION BEING SUBSTANTIALLY COMPLETELY FREE OF SULFATE IONS.
References Cited (Backward Citations)
CA624887A
Cited
US1975239A
Cited
US2088615A
Cited
DE881596C
Cited
US2354746A
Cited
US2623847A
Cited
US2841541A
Cited
US2841540A
Cited
SU135319A1
Cited
JPS3922105B1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-31 | 1972-07-01 | 1972-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-31 | 1976-07-01 | 1976-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-31 | 1980-07-01 | 1980-12-31 | $7700.00 | Window Closed / Lapsed |