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. 27, 1998
Filed:
May. 30, 1995
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 ; 6537413 ; 6537415 ; 65 26 ; 425808 ; 2491141 ; 249115 ; 106 3828 ;
Abstract
A mold for press molding an optical element of glass has carbon atoms injected in amounts from 10.sup.15 to 10.sup.18 ion/cm.sup.2 into a molding surface of a mold base of the mold and subjected to further treatment to form on the molding surface a diamond film, a hydrogenated amorphous carbon film, a hard carbon film or a mixture of at least two such films. The film on the molding surface can be formed by heat treatment and, additionally, by irradiation with hydrogen plasma, after carbon ion injection.