US Patent No: 5,426,015

Number of patents in Portfolio can not be more than 2000

Metallized azo dianion with two cationic dye counter ions for optical information recording medium

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Abstract

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There is disclosed a recordable optical element that includes a recording layer. The element has a transparent substrate and on the surface of the substrate, a) a recording layer containing a light absorbing material and b) a light reflecting layer, the improvement wherein said light absorbing material has the structure: ##STR1## wherein; R is hydrogen, alkyl having from 1 to about 20 carbons, substituted or substituted aryl from about 6 to 10 carbon atoms; R.sub.1 represents hydrogen or an alkyl group of from 1 to about 6 carbon atoms; R.sub.2 represents a hydrogen, an alkyl group of from 1 to about 5 carbon atoms; SO.sub.2 R'' or SO.sub.2 NHR'' where R'' is an alkyl group from 1 to about 10 carbon atoms; an aryl group of from about 6 to 10 carbon atoms or a hetaryl group of from about 5 to about 10 carbon atoms or a halogen atom; R.sub.3 represents hydrogen, an alkyl group of from 1 to about 4 carbon atoms or a halogen atom; R.sub.4 represents alkyl group 1 to 10 carbon atoms; SO.sub.2 R'', SO.sub.2 NHR'' where R'' is an alkyl group from 1 to about 10 carbon atoms; an aryl group of from about 6 to 10 carbon atoms or a hetaryl group of from about 5 to about 10 carbon atoms or a halogen atom; R.sub.5 represents an electron withdrawing group such as NO.sub.2, CN, SO.sub.2 R'', SO.sub.2 NR.sup.V R.sup.VI where R'', R.sup.V or R.sup.VI each independently can represent a hydrogen, an alkyl group of from 1 to about 5 carbon atoms; an aryl group of from about 6 to about 10 carbon atoms; a hetaryl group of from about 5 to about 10 carbon atoms; or a cycloalkyl group of from about 5 to about 7 carbon atoms; R.sub.6 represents hydrogen; an alkyl group of from 1 to about 5 carbon atoms; or a halogen atom; X represents oxygen, sulfur or carboxyl or sulfo groups; and Dye.sup.+ can be any dye that has one or more positive charges.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
EASTMAN KODAK COMPANYROCHESTER, NY16374

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Chapman, Derek D Rochester, NY 98 792
Cunningham, Michael P Torrington, CT 16 116
Kovacs, Csaba A Rochester, NY 27 156

Cited Art Landscape

Patent Info (Count) # Cites Year
 
RICOH COMPANY, LTD. (4)
4,652,514 Optical information recording medium 16 1984
4,626,496 Optical information recording medium 44 1985
4,735,839 Optical information recording medium 31 1986
4,767,693 Optical information recording medium 44 1987
 
TAIYO YUDEN CO., LTD. (2)
4,940,618 Optical information recording medium 58 1989
5,090,009 Optical information recording medium 59 1989
 
TDK CORPORATION (2)
4,735,889 Optical recording medium 30 1985
5,219,707 Photostable cyanine dye and optical recording medium 12 1990
 
CANON KABUSHIKI KAISHA (1)
5,178,995 Optical information recording medium 4 1991
 
EASTMAN KODAK COMPANY (1)
5,272,047 Optical information recording medium using azo dyes 14 1992
 
FUJIFILM CORPORATION (1)
4,994,343 Optical information recording medium 7 1988
 
HITACHI MAXELL, LTD. (1)
4,996,089 Optical data recording medium 8 1989
 
MITSUBISHI KASEI CORPORATION (1)
4,756,987 Optical recording medium 5 1986

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
EASTMAN KODAK COMPANY (13)
5,500,325 Dye mixtures for optical recording layers 16 1995
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 6 1996
5,773,193 Optical recording layers containing no k metallized formazan dyes mixed with symmetrical and unsymmetrical cyanine dyes 7 1996
5,731,054 Mixtures of low K metallized formazan dyes with symmetrical and unsymmetrical cyanine dyes 6 1996
5,821,029 Optical recording elements containing mixtures of metallized carbamoylazo and cyanine dyes 2 1997
5,821,346 Metallized carbamoylazo dyes 0 1997
5,786,124 Optical recording elements containing metallized carbamoylazo dyes 4 1997
6,582,881 Optical recording elements containing mixture of metallized azo ether and cyanine dyes 3 1998
6,270,943 Optical recording elements comprising novel metallized azo ether dyes 3 1998
6,447,981 Metallized azo thioether dyes 0 1998
 
CIBA SPECIALTY CHEMICALS CORPORATION (4)
5,851,621 High-capacity storage media 7 1997
5,958,650 Complex polymethine dyes and their use 12 1997
5,962,657 Complex polymethine dyes and their use 3 1999
7,754,863 High-capacity optical storage media 2 2005