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. 02, 2015
Filed:
Dec. 13, 2011
Applicants:
Takuya Murazumi, Chiba, JP;
Akiko Araki, Chiba, JP;
Takashi Niwa, Chiba, JP;
Matsuo Kishi, Chiba, JP;
Inventors:
Takuya Murazumi, Chiba, JP;
Akiko Araki, Chiba, JP;
Takashi Niwa, Chiba, JP;
Matsuo Kishi, Chiba, JP;
Assignee:
SEIKO INSTRUMENTS INC., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G04B 37/00 (2006.01); C25D 5/54 (2006.01); C23F 1/00 (2006.01); C23F 3/06 (2006.01); C22F 1/18 (2006.01); C23F 1/26 (2006.01); G04B 13/02 (2006.01); G04B 17/06 (2006.01); G04B 19/04 (2006.01); G04B 19/12 (2006.01); G04B 29/02 (2006.01); C25D 11/26 (2006.01);
U.S. Cl.
CPC ...
C23F 3/06 (2013.01); C22F 1/183 (2013.01); C23F 1/26 (2013.01); G04B 13/02 (2013.01); G04B 17/063 (2013.01); G04B 19/042 (2013.01); G04B 19/12 (2013.01); G04B 29/027 (2013.01); C25D 11/26 (2013.01);
Abstract
A timepiece part, such as a balance staff, an oscillating weight or a dial, is made of polycrystalline material having a plurality of crystals each having a size of 0.7 μm or more and 3 mm or less. The crystals at a surface of the timepiece part have mirror-finished surfaces, and the surfaces may be anodized to provide corrosion resistance. The normal directions of the mirror-finished surfaces are different from one another and provide a metallic luster to the timepiece part.