US4607097A
Expired / Lapsed
US
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Dichromatic coloring matter for a colored liquid crystal display element
Assignee: Sanyo Color Works Ltd
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Filing: 1984-06-04
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Granted: 1986-08-19
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Expires: 2004-06-04
Abstract
Abstract A dichromatic coloring matter for a colored liquid crystal display element comprising a compound of the general formula: ##STR1## where A and B each stand for ##STR2## where n is 0, 1, 2, 3 or 4, and X and Y each stand for ##STR3## where R 1 and R 2 stand for an alkyl group or hydrogen, --R (alkyl group) or --OR (alkoxy group).
Inventors
- 👤 Mitsuru Kano
- 👤 Yoshinori Kato
- 👤 Yoshimi Kamijo
- 👤 Yoshio Takeda
- 👤 Yoshinari Sakikubo
- 👤 Naoki Yagi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:05
CPC Classifications
C; C09; C09B; C09B5/00; C09B5/62; C09K; C09K19/00; C09K19/52; C09K19/60; C09K19/601; C09K19/606
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
64 words
A dichromatic coloring matter for a colored liquid crystal display element comprising a compound of the general formula: ##STR34## where A and B each stand for ##STR35## where n is 0, 1, 2, 3 or 4, and X and Y each stand for ##STR36## where R 1 and R 2 stand for an alkyl group or hydrogen, --R (alkyl group) or --OR (alkoxy group).
Claim 2
Dependent Claim
64 words
A dichromatic coloring matter for a colored liquid crystal display element comprising a compound of the general formula: ##STR34## where A and B each stand for ##STR35## where n is 0, 1, 2, 3 or 4, and X and Y each stand for ##STR36## where R 1 and R 2 stand for an alkyl group or hydrogen, --R (alkyl group) or --OR (alkoxy group).
Claim 3
Dependent Claim
21 words
A dichromatic coloring matter as set forth in claim 1, wherein said compound has a molecular structure of the formula: ##STR37##
Claim 4
Dependent Claim
21 words
A dichromatic coloring matter as set forth in claim 1, wherein said compound has a molecular structure of the formula: ##STR38##
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GB1056299A
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US4262851A
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EP0042819A1
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-08-18 | 1990-02-17 | 1990-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-18 | 1994-02-17 | 1994-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-18 | 1998-02-17 | 1998-08-19 | $7700.00 | Window Closed / Lapsed |