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:
Jan. 05, 1999
Filed:
Oct. 30, 1996
Applicant:
Inventor:
Yasushi Taniguchi, Kawasaki, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C03B / ; C03B / ; B29C / ;
U.S. Cl.
CPC ...
65286 ; 65305 ; 653741 ; 6537415 ; 65 26 ; 425808 ; 2491141 ; 249115 ; 106 3828 ;
Abstract
Molds for press molding an optical element of glass are disclosed. Proposed are: (1) A mold contains oxygen at the interface between a mold base of the mold and a carbon film formed at least on the molding surface of the mold base with an oxygen amount of 0-10 atom % and with the interface of a width of 0-500 .ANG., (2) a mold subjected to carbon ion injection at least on the molding surface of the mold base, and (3) a mold subjected to ion injection during or after formation of a carbon film at least on the molding surface of the mold base material.