US2784153A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrodeposition of chromium
Assignee: Harshaw Chemical Co
•
Filing: 1955-03-28
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Granted: 1957-03-05
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Expires: 1975-03-28
Abstract
No abstract record available.
Inventors
- 👤 Rose Arthur H Du
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:18
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
IN A PROCESS OF CHROMIUM PLATING FROM A SOLUTION COMPRISING WATER, CHROMIC ACID, SULFATE ION AND A CATALYTIC ION SELECTED FROM THE GROUP CONSISTING OF ACETATE, FLUOSILICATE AND FLUOBORATE IONS, THE METHOD OF REDUCING THE QUANTITY OF ANODE SLUDGE FORMATION WHEN ELECTROLYZING SAID SOLUTION BETWEEN A LEAD ANODE AND A CATHODE TO BE COATED COMPRISING INCORPORATING COBALTOUS ION IN SAID SOLUTION IN CONCENTRATIONS FROM ABOUT 0.4 TO ABOUT 5.0 GRAMS PER LITER.
Claim 2
Dependent Claim
72 words
IN A PROCESS OF CHROMIUM PLATING FROM A SOLUTION COMPRISING WATER, CHROMIC ACID, SULFATE ION AND A CATALYTIC ION SELECTED FROM THE GROUP CONSISTING OF ACETATE, FLUOSILICATE AND FLUOBORATE IONS, THE METHOD OF REDUCING THE QUANTITY OF ANODE SLUDGE FORMATION WHEN ELECTROLYZING SAID SOLUTION BETWEEN A LEAD ANODE AND A CATHODE TO BE COATED COMPRISING INCORPORATING COBALTOUS ION IN SAID SOLUTION IN CONCENTRATIONS FROM ABOUT 0.4 TO ABOUT 5.0 GRAMS PER LITER.
References Cited (Backward Citations)
US1465173A
Cited
US1717468A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-03-04 | 1960-09-03 | 1961-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-03-04 | 1964-09-03 | 1965-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-03-04 | 1968-09-03 | 1969-03-05 | $7700.00 | Window Closed / Lapsed |