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:
Sep. 21, 1993
Filed:
May. 30, 1991
Applicant:
Inventor:
Noriko Kurihara, Nerima, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B29C / ; C03B / ;
U.S. Cl.
CPC ...
2491141 ; 6537415 ; 249115 ;
Abstract
Disclosed is a mold for forming glass material into optical elements, such as lenses and prisms, by press molding. In particular, the optical-element-molding surface of this mold is coated with diamond crystals in predetermined, spaced apart portions.