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. 01, 2002
Filed:
Sep. 28, 2000
Applicant:
Inventors:
Reikou Fukazaki, Tokyo, JP;
Teruo Yamashita, Tokyo, JP;
Assignee:
Hoya Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C03B 2/100 ; B29C 5/100 ;
U.S. Cl.
CPC ...
C03B 2/100 ; B29C 5/100 ;
Abstract
A molded article having a highly accurate outer form accuracy, including various optical products, is produced from a preform having a simple form by a press-molding, in which a fine pattern can be highly accurately transferred and no burr is formed. A first mold member having a concave portion with an inner surface made of a molding surface and a second mold member which is to be opposed to the first mold member and has a molding surface are used to press-mold the preform. The preform is shaped in a polyhedral form to permit fitting of the preform in the concave portion of the first mold member.