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. 18, 1992
Filed:
Aug. 13, 1991
Applicant:
Inventors:
Shigeo Kittaka, Hyogo, JP;
Hiroshi Koshi, Kanagawa, JP;
Yoshikazu Kaite, Hyogo, JP;
Minoru Toyama, Hyogo, JP;
Noboru Akazawa, Kanagawa, JP;
Assignee:
Nippon Sheet Glass Co., Ltd., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C03C / ;
U.S. Cl.
CPC ...
65 3013 ; 501 64 ; 501 78 ;
Abstract
This invention relates to a method of performing an ion exchange of optical glass to produce an axial gradient index material having a good linear distributiion by bringing a glass body containing a monovalent cation component into contact with a medium containing a monovalent cation component and exchanging these cation components under a predetermined condition.