US4769307A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical recording member
Assignee: Mitsubishi Chemical Corp
•
Filing: 1986-08-12
•
Granted: 1988-09-06
•
Expires: 2006-08-12
Abstract
Abstract PCT No. PCT/JP86/00412 Sec. 371 Date Feb. 25, 1987 Sec. 102(e) Date Feb. 25, 1987 PCT Filed Aug. 12, 1986 PCT Pub. No. WO87/01076 PCT Pub. Date Feb. 26, 1987.An optical recording member for performing recording and reproduction of information by causing changes in the state thereof with a laser beam, which optical recording member comprises a base plate and a recording layer provided on the base plate and containing therein a phthalocyanine type compound and/or naphthalocyanine type compound represented by the following general formula: <IMAGE> [I] (where: R1 to R4 represent substituted and/or unsubstituted alkyl group, alkoxyalkyl group, aryl group, and so forth; and A denotes Pb, Sn, Cu, Ni, VO, and so on).
Inventors
- 👤 Tetsuo Ozawa
- 👤 Shuichi Maeda
- 👤 Yutaka Kurose
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:04
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
173 words
An optical recording member, comprising: a recording layer containing a light absorbing substance supported on a substrate, said optical recording layer recording information by being thermally deformed upon impact of a laser beam on portions of the recording layer and reproducing information by permitting the reading of a difference in reflections between the non-deformed portions and the deformed portions of said recording layer, the light recording substance of said recording layer being a metal complex of the formula: ##STR7## wherein R 1 , R 2 , R 3 and R 4 each represent --C 2 H 4 O-- n Y, wherein Y represents hydrogen, aryl or alkyl, each of which may be substituted, n is an integer of from 1 to 4 and A is a metal of the group I-B series, the group II-A series, the group II-B series, the group III-A series, the group III-B series, the group IV-A series, the group IV-B series, the group V-B series and of group VIII of the Periodic Table, or compounds containing said metals.
Claim 2
Dependent Claim
173 words
An optical recording member, comprising: a recording layer containing a light absorbing substance supported on a substrate, said optical recording layer recording information by being thermally deformed upon impact of a laser beam on portions of the recording layer and reproducing information by permitting the reading of a difference in reflections between the non-deformed portions and the deformed portions of said recording layer, the light recording substance of said recording layer being a metal complex of the formula: ##STR7## wherein R 1 , R 2 , R 3 and R 4 each represent --C 2 H 4 O-- n Y, wherein Y represents hydrogen, aryl or alkyl, each of which may be substituted, n is an integer of from 1 to 4 and A is a metal of the group I-B series, the group II-A series, the group II-B series, the group III-A series, the group III-B series, the group IV-A series, the group IV-B series, the group V-B series and of group VIII of the Periodic Table, or compounds containing said metals.
Claim 3
Dependent Claim
36 words
The optical recording member according to claim 1, wherein A is Sn, SnL 2 , Ge, GeL 2 , Pb, Fe, Ni, Co, VO, InL, TiO, Si, Cu, Mg, Zn, or AlL, wherein L is halogen.
Claim 4
Dependent Claim
15 words
The optical recording member accordng to claim 2, wherein A is VO, Ni, or Cu.
Claim 5
Dependent Claim
23 words
The optical recording member according to claim 1, wherein R 1 , R 2 , R 3 and R 4 are (lower)alkoxy(lower)alkyl groups.
Claim 6
Dependent Claim
16 words
The optical recording member according to claim 4, wherein said (lower)alkoxy(lower)alkyl group is methoxyethyl or butoxyethyl.
Claim 7
Dependent Claim
13 words
The optical recording member according to claim 1, wherein substituent Y is phenyl.
Claim 8
Dependent Claim
30 words
The optical recording member according to claim 1, wherein said substituent Y is C 1-25 alkyl or a C 1-25 alkyl group substituted by hydroxyl, carboxyl or carboxylic acid ester.
References Cited (Backward Citations)
US2122137A
Cited
US2795583A
Cited
US2859219A
Cited
JPS5085630A
Cited
GB1489394A
Cited
JPS5686795A
Cited
JPS5782093A
Cited
US4492750A
Cited
JPS60184565A
Cited
JPS61177287A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-09-06 | 1992-03-07 | 1992-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-06 | 1996-03-07 | 1996-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-06 | 2000-03-07 | 2000-09-06 | $7700.00 | Window Closed / Lapsed |