US2517441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrodeposition of chromium
Assignee: Ductile Chrome Process Co
•
Filing: 1945-07-09
•
Granted: 1950-08-01
•
Expires: 1965-07-09
Abstract
No abstract record available.
Inventors
- 👤 Raab Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:45
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/04; C25D3/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A PLATING BATH FOR ELECTROLYTICALLY DEPOSITING CHROMIUM, BEING CHARACTERIZED BY SUPERIOR THROWING POWER, HIGH CURRENT EFFICIENCY AND SUBSTANTIALLY CONSTANT LOW CONCENTRATION OF TRIVALENT CHROMIUM, CONSISTING ESSENTIALLY OF AN AQUEOUS SOLUTION CONTAINING PER GALLON OF SOLUTION FROM ABOUT 8 TO 70 OZ. CHROMIC OXIDE, FROM ABOUT 0.1 TO 3 OZ. HYDROFLUORIC ACID AND FROM ABOUT 0.001 TO 1 OZ. OF AN ORGANIC ACID SELECTED FROM A CLASS CONSISTING OF MALIC AND TARTARIC ACIDS.
Claim 2
Dependent Claim
72 words
A PLATING BATH FOR ELECTROLYTICALLY DEPOSITING CHROMIUM, BEING CHARACTERIZED BY SUPERIOR THROWING POWER, HIGH CURRENT EFFICIENCY AND SUBSTANTIALLY CONSTANT LOW CONCENTRATION OF TRIVALENT CHROMIUM, CONSISTING ESSENTIALLY OF AN AQUEOUS SOLUTION CONTAINING PER GALLON OF SOLUTION FROM ABOUT 8 TO 70 OZ. CHROMIC OXIDE, FROM ABOUT 0.1 TO 3 OZ. HYDROFLUORIC ACID AND FROM ABOUT 0.001 TO 1 OZ. OF AN ORGANIC ACID SELECTED FROM A CLASS CONSISTING OF MALIC AND TARTARIC ACIDS.
References Cited (Backward Citations)
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Cited
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Cited
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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) | 1953-07-31 | 1954-01-30 | 1954-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-31 | 1958-01-30 | 1958-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-31 | 1962-01-30 | 1962-08-01 | $7700.00 | Window Closed / Lapsed |