US Patent No: 7,727,372
Number of patents in Portfolio can not be more than 2000
Anodizing valve metals by self-adjusted current and power
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Jun 1, 2010
Issued date -
Dec 5, 2005
filing date -
11/164,751
serial no -
In Force
status
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Abstract
A method for anodizing valve metal structures to a target formation voltage is described. The valve metal structures are placed in an anodizing electrolyte and connected to a power supply that generates a source voltage to at least one current limiting device. If at least two current limiting devices are used, they are in series with the valve metal structures with the one current limiting device connected to at least one structure. The valve metal structures are then subjected to a current that decreases over time, a formation voltage that increases over time to a level below the voltage from the power supply and a power level that is self-adjusted to a level that decreases excessive heating in the structure. The invention also includes the components for the method.
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First Claim
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
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| 5,185,075 Surface treated titanium/titanium alloy articles and process for producing | 18 | 1990 | |
| 5,211,832 Process for producing electrically impervious anodized films on valve metals and product thereof | 7 | 1992 | |
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| 5,837,121 Method for anodizing valve metals | 16 | 1997 | |
| 6,267,861 Method of anodizing valve metals | 7 | 2000 | |
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| 4,859,288 Porous anodic aluminum oxide films | 14 | 1988 | |
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| 5,503,730 Method for anodic oxidation | 4 | 1995 | |
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| 6,231,993 Anodized tantalum pellet for an electrolytic capacitor | 17 | 1999 | |
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| 4,839,002 Method and capacitive discharge apparatus for aluminum anodizing | 15 | 1987 | |
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| 6,802,951 Methods of anodizing valve metal anodes | 17 | 2002 | |
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| 6,368,485 Forming electrolyte for forming metal oxide coating film | 25 | 2000 | |
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| 4,936,957 Thin film oxide dielectric structure and method | 18 | 1988 | |
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| 4,687,551 Porous films and method of forming them | 19 | 1985 | |
Patent Citation Ranking
Maintenance Fees
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