The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 07, 2011
Filed:
Mar. 16, 2004
Applicants:
Hiroshi Tamagaki, Takasago, JP;
Toshimitsu Kohara, Takasago, JP;
Inventors:
Hiroshi Tamagaki, Takasago, JP;
Toshimitsu Kohara, Takasago, JP;
Assignee:
Kobe Steel, Ltd., Kobe-shi, JP;
Primary Examiner:
Int. Cl.
CPC ...
B32B 15/04 (2006.01); C23C 14/06 (2006.01);
U.S. Cl.
CPC ...
Abstract
Provided is a protective alumina film mainly containing alumina in the α-crystal structure and fine crystal grains in which one or more regions containing additionally an element other than aluminum formed along the planes in the direction almost perpendicular to the thickness direction of the protective film are present intermittently in the thickness direction inside the protective film.