US4138359A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid crystal composition and method for making same
Assignee: Citizen Watch Co Ltd
•
Filing: 1977-02-25
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Granted: 1979-02-06
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Expires: 1997-02-25
Abstract
Abstract A new and novel liquid crystal composition having broad temperature and chemical stability is disclosed. The liquid crystal composition comprises a compound having the general formula: ##STR1## wherein R represents an alkyl or alkoxyl group and X represents an alkyl, alkoxyl, nitro or cyano group. The method for making the liquid crystal compound includes the methylation of 4-phenyl-2-chlorophenol and like compounds.
Inventors
- 👤 Yutaka Mizukuchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:51
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/10; C09K19/20; C09K19/2007; C07; C07C; C07C205/00; C07C205/49; C07C205/57
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
38 words
A liquid crystal compound having the formula: ##STR10## wherein R represents an alkyl group of eight carbon atoms and X represents an alkyl group of eight carbon atoms, alkoxyl group of eight carbon atoms or a nitro group.
Claim 2
Dependent Claim
38 words
A liquid crystal compound having the formula: ##STR10## wherein R represents an alkyl group of eight carbon atoms and X represents an alkyl group of eight carbon atoms, alkoxyl group of eight carbon atoms or a nitro group.
Claim 3
Dependent Claim
14 words
The compound according to claim 1, wherein X is alkyl of eight carbon atoms.
Claim 4
Dependent Claim
14 words
The compound according to claim 1, wherein X is alkoxyl of eight carbon atoms.
Claim 5
Dependent Claim
12 words
The compound according to claim 1, wherein X is NO 2 .
Claim 6
Dependent Claim
18 words
A liquid crystal composition comprising a mixture of at least two different compounds as defined in claim 1.
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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) | 1982-02-05 | 1982-08-07 | 1983-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-05 | 1986-08-07 | 1987-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-05 | 1990-08-07 | 1991-02-06 | $7700.00 | Window Closed / Lapsed |