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:
Feb. 11, 2003
Filed:
Nov. 07, 2000
Applicant:
Inventors:
Assignee:
Citizen Watch, Co., Ltd., Nishitokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29C 4/500 ;
U.S. Cl.
CPC ...
B29C 4/500 ;
Abstract
A cavity ( ) for a mold for molding a resin is formed by a fixed mold ( ) and a moving mold ( ), and a diamond-like carbon film ( ) is formed on at least at a part to be contacted with a stamper ( ) on a surface ( ) of the mold ( ) to which the stamper ( ) is attached with an intermediate layer ( ) made of silicon, tungsten, titanium carbide, silicon carbide, chromium carbide, or the like which improves adhesion to the surface ( ) of the mold ( ) interposed in-between to drastically increase useful life of the mold for molding a resin and also increase useful life of the stamper without causing damage thereto.