Metal treatment – Stock – Aluminum base
Reexamination Certificate
2006-04-25
2006-04-25
Wyszomierski, George (Department: 1742)
Metal treatment
Stock
Aluminum base
C420S542000
Reexamination Certificate
active
07033447
ABSTRACT:
We have discovered that the formation of particulate inclusions at the surface of an aluminum alloy article, which inclusions interfere with a smooth transition from the alloy surface to an overlying aluminum oxide protective film, can be controlled by maintaining the content of mobile and nonmobile impurities within a specific range and controlling the particulate size and distribution of the mobile and nonmobile impurities and compounds thereof; by heat-treating the aluminum alloy at a temperature less than about 330° C.; and by creating the aluminum oxide protective film by employing a particular electrolytic process. When these factors are taken into consideration, an improved aluminum oxide protective film is obtained.
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Lin Yixing
Stow Clifford C
Sun Jennifer Y
Thach Senh
Wang Hong
Applied Materials Inc.
Duckor Spradling Metzger & Wynne
Morillo Janelle
Wyszomierski George
LandOfFree
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