Graded index lens

United States of America Patent

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Jan 28, 2003
Grant Date
Jun 14, 2001
app pub date
Dec 1, 2000
filing date
Dec 1, 1999

priority date (Note)
Expired

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Abstract

A graded index lens is obtained by treating a raw glass material having a rod shape by ion exchange using silver to form a refractive index distribution in the radial direction of the rod, wherein the raw glass material comprises a glass composition of the following components: 15

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Patent Owner(s)

NIPPON SHEET GLASS CO., LTD.

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[Patents Count]

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Kittaka, Shigeo	Osaka, JP	50	397
Yamaguchi, Jun	Osaka, JP	174	1775

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Graded index lens

Number of patents in Portfolio can not be more than 2000

United States of America Patent

09726517

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PATENT NO	6511932
APP PUB NO	20010003724A1
SERIAL NO	09726517
DOCKET NO

US Family Size	Non-US Coverage
Patent Longevity Expired	Forward Citations

DATE PUBLISHED	PUBLICATION/PATENT NO.	PUBLICATION TYPE
January 28, 2003	US,6511932,B2 US6511932B2	GRANTED PATENT AS SECOND PUBLICATION
June 14, 2001	US,20010003724,A1 US20010003724A1	FIRST PUBLISHED PATENT APPLICATION

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09726517

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