Patent US3303113A successfully refreshed from Google Patents.
US3303113A
Expired / Lapsed
US
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Chromium plating
Assignee: Udylite Corp
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Filing: 1963-10-18
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Granted: 1967-02-07
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Expires: 1983-10-18
Abstract
No abstract record available.
Inventors
- 👤 Edward A Romanowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:01
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
A BATH FOR THE ELECTRODEPOSITION OF CHROMIUM PLATE COMPRISING AN AQUEOUS ACIDIC HEXAVALENT CHROMIUM SOLUTION CONTAINING A RATIO OF CONCENTRATIONS OF CRO3 TO SULFATE ION GREATER THAN ABOUT 100 TO 1, AND LESS THAN ABOUT 200 TO 1, AND CONTAINING AT LEAST ONE FLUORINE-CONTAINING THORIUM COMPOUND IN A CONCENTRATION OF ABOUT 0.2 GRAM/ LITER TO SATURATION CONCENTRATIONS.
Claim 2
Dependent Claim
57 words
A BATH FOR THE ELECTRODEPOSITION OF CHROMIUM PLATE COMPRISING AN AQUEOUS ACIDIC HEXAVALENT CHROMIUM SOLUTION CONTAINING A RATIO OF CONCENTRATIONS OF CRO3 TO SULFATE ION GREATER THAN ABOUT 100 TO 1, AND LESS THAN ABOUT 200 TO 1, AND CONTAINING AT LEAST ONE FLUORINE-CONTAINING THORIUM COMPOUND IN A CONCENTRATION OF ABOUT 0.2 GRAM/ LITER TO SATURATION CONCENTRATIONS.
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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) | 1970-02-06 | 1970-08-08 | 1971-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-06 | 1974-08-08 | 1975-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-06 | 1978-08-08 | 1979-02-07 | $7700.00 | Window Closed / Lapsed |