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:
Aug. 14, 1990
Filed:
May. 18, 1989
Applicant:
Inventors:
Assignee:
Hoya Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B05D / ;
U.S. Cl.
CPC ...
427 38 ; 427 57 ; 427299 ;
Abstract
The process for producing a glass mold according to the present invention comprises forming, on a glass mold base, a thin film consisting of diamond crystallites, graphite crystallites and amorphous carbon and having a maximum surface roughness of 200 .ANG. or below, by a plasma CVD method or a thermal CVD method using a mixed gas comprising an organic gas and hydrogen gas, the concentration of the organic gas in the mixed gas being at least 3 mole %. The glass mold obtained according to the present process has advantages of having excellent releasability of molded glass article after press molding, excellent durability and a long life.