US4711798A
Expired / Lapsed
US
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Optical information recording medium
Assignee: Ricoh Co Ltd
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Filing: 1986-12-16
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Granted: 1987-12-08
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Expires: 2006-12-16
Abstract
Abstract An optical information recording medium comprising a pair of substrates, with a recording layer comprising an organic dye being formed on one side of at least one substrate, fixed to each other through or without through a spacer and by an adhesive agent, in such a manner that the recording layer comes between the substrates, the adhesive agent comprising a compound of formula (I), ##STR1## wherein φ represents ##STR2## (l=0 or 1) or ##STR3## in which R represents a methyl group or an ethyl group, m is an integer of 1 to 4, and n is an integer of 2 to 4; and a compound of formula (II), ##STR4## wherein n is an integer of 4 to 8, to which a compound of formula (III) may be added, ##STR5## wherein L represents --CH 2 CH 2 O m (m=1 to 4) or --CH 2 C(OH)HCH 2 O--, R 1 represents --C n H 2n+1 (n=4 to 12), R 2 represents Cl or Br (n=0, 1 or 2).
Inventors
- 👤 Yutaka Ueda
- 👤 Tetsu Yamamuro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:38
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/24; G11B7/241; G11B7/252; G11B7/256; C; C08; C08F; C08F290/00; C08F290/02; C08F290/06; C08F290/067; C09; C09J; C09J4/00; C09J4/06; G11B7/253; G11B7/2533; G11B7/242; G11B7/243; G11B7/2433; G11B7/244; G11B7/246; G11B7/2463; G11B7/2467; G11B7/247; G11B7/2472; G11B7/2475; G11B7/248; G11B7/257; G11B7/2578; G11B7/258; G11B7/2585; G11B7/259; Y; Y10; Y10S; Y10S430/00; Y10S430/146
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
118 words
An optical information recording medium comprising a pair of substrates, with a recording layer comprising an organic dye being formed on one side of at least one substrate, fixed to each other through or without through a spacer and by an adhesive agent, in such a manner that said recording layer comes between said substrates, said adhesive agent comprising a compound of formula (I), ##STR127## wherein φ represents ##STR128## (l=0 or 1) or ##STR129## in which R represents a methyl group or an ethyl group, m is an integer of 1 to 4, and n is an integer of 2 to 4; and a compound of formula (II), ##STR130## wherein n is an integer of 4 to 8.
Claim 2
Dependent Claim
118 words
An optical information recording medium comprising a pair of substrates, with a recording layer comprising an organic dye being formed on one side of at least one substrate, fixed to each other through or without through a spacer and by an adhesive agent, in such a manner that said recording layer comes between said substrates, said adhesive agent comprising a compound of formula (I), ##STR127## wherein φ represents ##STR128## (l=0 or 1) or ##STR129## in which R represents a methyl group or an ethyl group, m is an integer of 1 to 4, and n is an integer of 2 to 4; and a compound of formula (II), ##STR130## wherein n is an integer of 4 to 8.
Claim 3
Dependent Claim
60 words
The optical information recording medium as claimed in claim 1, wherein said adhesive agent further comprises a compound of formula (III), ##STR131## wherein L represents --CH 2 CH 2 O m (m=1 to 4) or --CH 2 C(OH)HCH 2 O--, R 1 represents --C n H 2n+1 (n=4 to 12), R 2 represents Cl or Br (n=0, 1 or 2).
Claim 4
Dependent Claim
58 words
The optical information recording medium as claimed in claim 2, wherein said adhesive agent comprises said compound of formula (I) in an amount of 40 wt.% to 70 wt.%, said compound of formula (II) in an amount of 10 wt.% to 30 wt.%, and said compound of formula (III) in an amount of 10 wt.% to 30 wt.%.
Claim 5
Dependent Claim
44 words
The optical information recording medium as claimed in claim 1, wherein said adhesive agent comprises said compound of formula (I) in an amount of 40 wt.% to 70 wt.%, and said compound of formula (II) in an amount of 10 wt.% to 30 wt.%.
Claim 6
Dependent Claim
22 words
The optical information recording medium as claimed in claim 1, wherein said recording layer comprises as the main component a polymethine dye.
Claim 7
Dependent Claim
23 words
The optical information recording medium as claimed in claim 1, wherein said spacer comprises an inner circumferential spacer and an outer circumferential spacer.
References Cited (Backward Citations)
US4616238A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-12-07 | 1991-06-08 | 1991-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-12-07 | 1995-06-08 | 1995-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-12-07 | 1999-06-08 | 1999-12-08 | $7700.00 | Window Closed / Lapsed |