US2750337A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroplating of chromium
Assignee: Udylite Research Corp
•
Filing: 1953-04-22
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Granted: 1956-06-12
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Expires: 1973-04-22
Abstract
No abstract record available.
Inventors
- 👤 Brown Henry
- 👤 Donald R Millage
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:29
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/04; C25D3/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
IN A PROCESS OF ELECTRODEPOSITION CHROMIUM FROM AQUEOUS ACIDIC HEXALVALENT CHROMIUM SOLUTION THE IMPROVEMENT WHICH CONSISTS IN ADDING TO THE SOLUTION THE COMBINATION OF 5-60 GRAMS/LITER OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF PYRIDINE AND PICOLINES AND MIXTURES THEREOF, AND A SMALL AMOUNT OF A COMPOUND EFFECTIVE TO SUBSTANTIALLY REDUCE THE FORMATION OF SPRAY DURING CHROMIUM ELECTRODEPOSITION HAVING THE FORMULA RFSO3X WHERE RF REPRESENTS A SATURATED FLUOROCARBON CHAIN OF 4 TO 8 CARBON ATOMS AND X IS A CATION.
Claim 2
Dependent Claim
81 words
IN A PROCESS OF ELECTRODEPOSITION CHROMIUM FROM AQUEOUS ACIDIC HEXALVALENT CHROMIUM SOLUTION THE IMPROVEMENT WHICH CONSISTS IN ADDING TO THE SOLUTION THE COMBINATION OF 5-60 GRAMS/LITER OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF PYRIDINE AND PICOLINES AND MIXTURES THEREOF, AND A SMALL AMOUNT OF A COMPOUND EFFECTIVE TO SUBSTANTIALLY REDUCE THE FORMATION OF SPRAY DURING CHROMIUM ELECTRODEPOSITION HAVING THE FORMULA RFSO3X WHERE RF REPRESENTS A SATURATED FLUOROCARBON CHAIN OF 4 TO 8 CARBON ATOMS AND X IS A CATION.
References Cited (Backward Citations)
US2195409A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-12 | 1959-12-12 | 1960-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-12 | 1963-12-12 | 1964-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-12 | 1967-12-12 | 1968-06-12 | $7700.00 | Window Closed / Lapsed |