US4859569A
Expired / Lapsed
US
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Optical recording medium
Assignee: Yamamoto Chemicals Inc
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Filing: 1987-11-10
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Granted: 1989-08-22
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Expires: 2007-11-10
Abstract
Abstract An optical recording medium comprising practically a naphthalocyanine dye represented by the following general formula (I): ##STR1## wherein M means a metal, metal oxide or metal halide, and --OR 1 , --OR 2 , --OR 3 and --OR 4 are the same or different and denote ether groups respectively having R 1 , R 2 , R 3 and R 4 each of which is a saturated or unsaturated hydrocarbon group having 4-12 carbon atoms.
Inventors
- 👤 Sumio Hirose
- 👤 Hiroshi Ozawa
- 👤 Kenji Abe
- 👤 Yoichi Hosono
- 👤 Shigeru Takahara
- 👤 Tadashi Koike
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:43
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/24; G11B7/241; G11B7/242; G11B7/244; G11B7/246; G11B7/248; Y; Y10; Y10S; Y10S430/00; Y10S430/146
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
110 words
An optical recording medium permitting recording and reading-out of signals, comprising a transparent substrate and an optically reflective recording layer provided directly on said substrate, said recording layer having an amount of resinous binder therein of substantially 0 wt. % and containing a napthalocyanine dye having the formula (I): ##STR4## wherein M is a metal, metal oxide or metal halide, and --OR 1 , --OR 2 , --OR 3 and --OR 4 are the same or different and denote ether groups, respectively, having R 1 , R 2 , R 3 and R 4 each of which is a saturated or unsaturated hydrocarbon group having 4 to 12 carbon atoms.
Claim 2
Dependent Claim
110 words
An optical recording medium permitting recording and reading-out of signals, comprising a transparent substrate and an optically reflective recording layer provided directly on said substrate, said recording layer having an amount of resinous binder therein of substantially 0 wt. % and containing a napthalocyanine dye having the formula (I): ##STR4## wherein M is a metal, metal oxide or metal halide, and --OR 1 , --OR 2 , --OR 3 and --OR 4 are the same or different and denote ether groups, respectively, having R 1 , R 2 , R 3 and R 4 each of which is a saturated or unsaturated hydrocarbon group having 4 to 12 carbon atoms.
Claim 3
Dependent Claim
29 words
The optical recording medium as claimed in claim 1, wherein said transparent substrate has a transmittance of light of 85% or higher, and is substantially free of optical anisotrophy.
Claim 4
Dependent Claim
19 words
The optical recording medium as claimed in claim 2, wherein said transparent substrate is a glass or plastic material.
Claim 5
Dependent Claim
70 words
The optical recording medium as claimed in claim 1, wherein said ether groups --OR 1 , --OR 2 , --OR 3 and --OR 4 are selected from the group consisting of n-butoxy, sec-butoxy, tert-butoxy, n-pentoxy, iso-pentoxy, sec-pentoxy, tert-pentoxy, n-hexoxy, iso-hexoxy, 1-methyl-1-ethylpropioxy, 1,1-dimethylbutoxy, n-heptoxy, iso-heptoxy, sec-heptoxy, tert-heptoxy, octoxy, 2-ethylhexoxy, nonyloxy, decyloxy, dodecyloxy, cyclohexyloxy, methylcyclohexyloxy, allyloxy, butenoxy, hexenoxy, octenoxy, dodecenoxy, cyclohexenoxy, methylcyclohexenoxy, phenoxy, methylphenoxy, ethylphenoxy, dimethylphenoxy, butylphenoxy, hexylphenoxy, benzyloxy, phenylethoxy and phenylhexoxy.
Claim 6
Dependent Claim
64 words
The optical recording medium as claimed in claim 1, wherein said metal, metal oxide or metal halide M is selected from the group consisting of a Group Ib metal, a Group II metal, a Group III metal, a Group IV metal, a Group V metal, a Group VI metal, a Group VIII metal, and a Group VIII metal and the oxides and halides thereof.
Claim 7
Dependent Claim
48 words
The optical recording medium as claimed in claim 5, wherein said metal, metal oxide or metal halide M is selected from the group consisting of Cu, Ni, Mg, Pd, Co, Nb, Sn, In, Ge, Ga, VO, TiO and the chloride, bromide or oxide of Al, Ga and In.
Claim 8
Dependent Claim
38 words
The optical recording medium as claimed in claim 6, wherein said metal, metal oxide or metal halide M is selected from the group consisting of VO, TiO, In, In--Cl, In--Br, Al--Cl, Al--Br, Ga--Cl, Ga--Br, Al--O--AI, Ga--O--Ga and In--O--In.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-08-21 | 1993-02-20 | 1993-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-08-21 | 1997-02-20 | 1997-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-08-21 | 2001-02-20 | 2001-08-22 | $7700.00 | Window Closed / Lapsed |