US3311548A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrodeposition of chromium
Assignee: Udylite Corp
•
Filing: 1964-02-20
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Granted: 1967-03-28
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Expires: 1984-02-20
Abstract
No abstract record available.
Inventors
- 👤 Brown Henry
- 👤 Edward A Romanowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:22
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/04; C25D3/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
A METHOD OF ELECTRODEPOSITING CHROMIUM WHICH COMPRISES ELECTROLYZING AN AQUEOUS ACIDIC HEXAVALENT CHROMIUM PLATING SOLUTION CONTAINING A RATIO OF CRO3 TO SULFATE ION GREATER THAN ABOUT 150 TO 1 AND LESS THAN ABOUT 400 TO 1 AND CONTAINING THEREIN DISSOLVED ABOUT 0.1 GRAM/LITER TO ABOUT 20 GRAMS/LITER OF A DICARBOXYLIC ACID CHARACTERIZED BY THE FOLLOWING FORMULA
Claim 2
Independent Claim
56 words
A METHOD OF ELECTRODEPOSITING CHROMIUM WHICH COMPRISES ELECTROLYZING AN AQUEOUS ACIDIC HEXAVALENT CHROMIUM PLATING SOLUTION CONTAINING A RATIO OF CRO3 TO SULFATE ION GREATER THAN ABOUT 150 TO 1 AND LESS THAN ABOUT 400 TO 1 AND CONTAINING THEREIN DISSOLVED ABOUT 0.1 GRAM/LITER TO ABOUT 20 GRAMS/LITER OF A DICARBOXYLIC ACID CHARACTERIZED BY THE FOLLOWING FORMULA
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-27 | 1970-09-26 | 1971-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-27 | 1974-09-26 | 1975-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-27 | 1978-09-26 | 1979-03-28 | $7700.00 | Window Closed / Lapsed |