US3288691A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of electrolytically chemically treating metals
Assignee: Yawata Iron and Steel Co Ltd
•
Filing: 1963-06-11
•
Granted: 1966-11-29
•
Expires: 1983-06-11
Abstract
No abstract record available.
Inventors
- 👤 Yonezaki Shigeru
- 👤 Kamada Minoru
- 👤 Teruyama Kazukiyo
- 👤 Kanechika Katsunori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:29
CPC Classifications
C; C25; C25D; C25D11/00; C25D11/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A METHOD OF ELECTROLYTICALLY CHEMICALLY TREATING METALS COMPRISING DIPOSITING A FILM ON THE METAL BY CATHODICALLY ELECTROLYZING A METAL IN AN AQUEOUS SOLUTION CONSISTING ESSENTIALLY OF 10 TO 300 GRAMS PER LITER OF HEXAVALENT CHROMIUM COMPOUND AND 1 TO 200 GRAMS PER LITER OF A MEMBER SELECTED FROM A GROUP CONSISTING OF HALOGEN OXY-ACIDS AND THEIR ALKALI METAL SALTS SAID SOLUTION BEING ADJUSTED TO HAVE A PH VALUE OF LESS THAN 1.5.
Claim 2
Independent Claim
72 words
A METHOD OF ELECTROLYTICALLY CHEMICALLY TREATING METALS COMPRISING DIPOSITING A FILM ON THE METAL BY CATHODICALLY ELECTROLYZING A METAL IN AN AQUEOUS SOLUTION CONSISTING ESSENTIALLY OF 10 TO 300 GRAMS PER LITER OF HEXAVALENT CHROMIUM COMPOUND AND 1 TO 200 GRAMS PER LITER OF A MEMBER SELECTED FROM A GROUP CONSISTING OF HALOGEN OXY-ACIDS AND THEIR ALKALI METAL SALTS SAID SOLUTION BEING ADJUSTED TO HAVE A PH VALUE OF LESS THAN 1.5.
References Cited (Backward Citations)
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US2812296A
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US3032487A
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US3118824A
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US2998361A
Cited
US3081238A
Cited
US3138548A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-28 | 1970-05-30 | 1970-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-28 | 1974-05-30 | 1974-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-28 | 1978-05-30 | 1978-11-29 | $7700.00 | Window Closed / Lapsed |