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:
Oct. 14, 1997
Filed:
Jan. 21, 1997
Applicant:
Inventors:
Yasushi Taniguchi, Kawasaki, JP;
Keiji Hirabayashi, Tokyo, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C03B / ;
U.S. Cl.
CPC ...
65286 ; 65305 ; 653741 ; 6537411 ; 6537415 ; 65 24 ; 65 602 ; 65 606 ; 65 64 ; 425808 ;
Abstract
There is disclosed a mold for pressing molding of an optical element of glass. On at least the molding surface of the mold base of the mold, there is formed a mixing layer which consists of carbon and at least one of the elements constituting the mold base. The atomic percentage of carbon increases toward the molding surface and decreases toward the mold base, while the atomic percentage of the other element decreases toward the surface and increases toward the mold base. The mold may contain an intermediate layer at least on the molding surface of the mold base.