US Patent No: 5,294,471

Number of patents in Portfolio can not be more than 2000

Optical information recording medium using metallized formazan dyes

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Abstract

There is disclosed a recordable optical element that includes a metallized dye. The element has a transparent substrate and on the surface of the substrate, a dye containing recording layer and a light reflecting layer. The improvement is that the dye is a metal complex of a metallized formazan dye. The dyes that are used in the element are very light stable.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
EASTMAN KODAK COMPANYROCHESTER, NY16255

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Evans, Steven Bucks, GB 147 1129
Kovacs, Csaba A Rochester, NY 26 156

Cited Art

Patent Info (Count) # Cites Year
 
TAIYO YUDEN CO., LTD. (2)
4,940,618 Optical information recording medium 55 1989
5,155,723 Optical information recording method and medium 17 1989
 
FUJIFILM CORPORATION (1)
5,024,923 Infrared absorbent compositions 25 1988

Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
EASTMAN KODAK COMPANY (13)
5,547,727 Optical recording elements having recording layers containing cationic azo dyes 4 1994
5,547,728 Optical recording elements having recording layers containing mixtures of formazan and cyanine dyes 17 1995
5,607,739 Temperature sensor and method for optical disk 3 1995
5,695,843 Mixtures of symmetrical and unsymmetrical nickel formazan dyes 3 1996
6,361,922 Thicker optical recording layers comprising a tetra dye having a metallized azo dianionic dye with cationic dye counterions 1 1996
5,922,429 Optical recording elements having recording layers containing mixtures of low k metallized formazan and cyanine dyes 2 1996
5,922,504 Optical recording elements having recording layers containing mixtures of no k metallized formazan and cyanine dyes 3 1996
5,876,821 Tetra dye mixed with another dye or dyes for optical recording elements 5 1996
5,773,193 Optical recording layers containing no k metallized formazan dyes mixed with symmetrical and unsymmetrical cyanine dyes 6 1996
5,731,054 Mixtures of low K metallized formazan dyes with symmetrical and unsymmetrical cyanine dyes 6 1996
5,882,760 Recordable optical disks with metallic interlayer 8 1997
6,020,041 Performance recording media for recordable element using gold reflector 0 1997
6,007,887 Performance recording media for recordable element using silver reflector 19 1997
 
RICOH COMPANY, LTD. (2)
6,762,008 Optical recording medium 6 2002
7,449,279 Optical information recording medium 0 2005
 
TDK CORPORATION (2)
5,391,462 Otical record disk 27 1993
5,604,004 Optical recording medium using formazan metal complex dye and photo-stabilizing method 15 1995
 
CIBA SPECIALTY CHEMICALS CORPORATION (1)
5,851,621 High-capacity storage media 5 1997
 
CLARIANT FINANCE (BVI) LIMITED (1)
7,625,621 Amino antipyrine based azo ligands and their metal complexes for use as optical recording media 0 2005
 
FUJI PHOTO FILM CO., LTD. (1)
6,020,105 Information recording medium 8 1997