US3983049A
Expired / Lapsed
US
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Liquid crystal compositions with positive dielectric anisotropy
Assignee: LXD Inc
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Filing: 1974-05-02
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Granted: 1976-09-28
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Expires: 1994-05-02
Abstract
Abstract Non-liquid crystal additives to negative dielectric anisotropy liquid crystals produce a positive dielectric anisotropy. Criteria for empirically determining suitable additives are disclosed. The general structure of suitable compounds is:
Inventors
- 👤 Siegfried Aftergut
- 👤 Herbert S. Cole, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:28
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/52; C09K19/54
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
47 words
A liquid crystal composition having positive dielectric anisotropy comprising: a negative dielectric anisotropy liquid crystal material; and a non-liquid crystal material comprising N-[p-(n-octyloxy) benzylidene]-p-nitroaniline, said non-liquid crystal material having no mesophase at any temperature and comprising more than zero percent and less than 15% of said composition.
Claim 2
Dependent Claim
47 words
A liquid crystal composition having positive dielectric anisotropy comprising: a negative dielectric anisotropy liquid crystal material; and a non-liquid crystal material comprising N-[p-(n-octyloxy) benzylidene]-p-nitroaniline, said non-liquid crystal material having no mesophase at any temperature and comprising more than zero percent and less than 15% of said composition.
Claim 3
Dependent Claim
46 words
A liquid crystal composition having positive dielectric anisotropy comprising: a negative dielectric anisotropy liquid crystal material; and a non-liquid crystal material comprising N-(p-methoxybenzylidene)-3,5-dinitroaniline, said non-liquid crystal material having no mesophase at any temperature and comprising more than zero percent and less than 15% of said composition.
Claim 4
Dependent Claim
46 words
A liquid crystal composition having positive dielectric anisotropy comprising: a negative dielectric anisotropy liquid crystal material; and a non-liquid crystal material comprising N-(p-methoxybenzylidene)-3,5-dinitroaniline, said non-liquid crystal material having no mesophase at any temperature and comprising more than zero percent and less than 15% of said composition.
Claim 5
Dependent Claim
46 words
A liquid crystal composition having positive dielectric anisotropy comprising: a negative dielectric anisotropy liquid crystal material; and a non-liquid crystal material comprising N-[p-(n-decyloxy)benzylidene]-3,5-dinitroaniline, said non-liquid crystal material having no mesophase at any temperature and comprising more than zero percent and less than 15% of said composition.
Claim 6
Dependent Claim
46 words
A liquid crystal composition having positive dielectric anisotropy comprising: a negative dielectric anisotropy liquid crystal material; and a non-liquid crystal material comprising N-[p-(n-decyloxy)benzylidene]-3,5-dinitroaniline, said non-liquid crystal material having no mesophase at any temperature and comprising more than zero percent and less than 15% of said composition.
Claim 7
Dependent Claim
48 words
A liquid crystal composition having positive dielectric anisotropy comprising: a negative dielectric anisotropy liquid crystal material; and a non-liquid crystal material comprising p-nitrophenyl phenyl ether, said non-liquid crystal material having no mesophase at any temperature and comprising more than zero percent and less than 15% of said composition.
Claim 8
Dependent Claim
48 words
A liquid crystal composition having positive dielectric anisotropy comprising: a negative dielectric anisotropy liquid crystal material; and a non-liquid crystal material comprising p-nitrophenyl phenyl ether, said non-liquid crystal material having no mesophase at any temperature and comprising more than zero percent and less than 15% of said composition.
Claim 9
Dependent Claim
46 words
A liquid crystal composition having positive dielectric anisotropy comprising: a negative dielectric anisotropy liquid crystal material; and a non-liquid crystal material comprising N-(p-dimethylaminobenzylidene)-p-aminobenzonitrile, said non-liquid crystal material having no mesophase at any temperature and comprising more than zero percent and less than 15% of said composition.
Claim 10
Dependent Claim
46 words
A liquid crystal composition having positive dielectric anisotropy comprising: a negative dielectric anisotropy liquid crystal material; and a non-liquid crystal material comprising N-(p-dimethylaminobenzylidene)-p-aminobenzonitrile, said non-liquid crystal material having no mesophase at any temperature and comprising more than zero percent and less than 15% of said composition.
Claim 11
Dependent Claim
46 words
A liquid crystal composition having positive dielectric anisotropy comprising: a negative dielectric anisotropy liquid crystal material; and a non-liquid crystal material comprising N-(p-diethylaminobenzylidene)-p-aminobenzonitrile, said non-liquid crystal material having no mesophase at any temperature and comprising more than zero percent and less than 15% of said composition.
Claim 12
Dependent Claim
46 words
A liquid crystal composition having positive dielectric anisotropy comprising: a negative dielectric anisotropy liquid crystal material; and a non-liquid crystal material comprising N-(p-diethylaminobenzylidene)-p-aminobenzonitrile, said non-liquid crystal material having no mesophase at any temperature and comprising more than zero percent and less than 15% of said composition.
Claim 13
Dependent Claim
76 words
A liquid crystal composition having positive dielectric anisotropy comprising: a negative dielectric anisotropy liquid crystal material; and a non-liquid crystal aromatic material, having no mesophase at any temperature, comprising more than zero percent and less than 15% of said composition, having a general formula: ##SPC5## where substituent R is selected from the group consisting of alkyl, dialkylamino, alkyloxy and hydrogen; and Z is selected from the group consisting of Schiff Base, ether, ester and direct bonds.
Claim 14
Dependent Claim
76 words
A liquid crystal composition having positive dielectric anisotropy comprising: a negative dielectric anisotropy liquid crystal material; and a non-liquid crystal aromatic material, having no mesophase at any temperature, comprising more than zero percent and less than 15% of said composition, having a general formula: ##SPC5## where substituent R is selected from the group consisting of alkyl, dialkylamino, alkyloxy and hydrogen; and Z is selected from the group consisting of Schiff Base, ether, ester and direct bonds.
Claim 15
Dependent Claim
23 words
The liquid crystal composition as set forth in claim 7 wherein said non-liquid crystal material comprises 5 percent of less of said composition.
Claim 16
Dependent Claim
54 words
A liquid crystal composition having positive dielectric anisotropy comprising: a negative dielectric anisotropy liquid crystal material: and a non-liquid crystal material selected from the group consisting of N-[p-dimethylaminobenzylidene)-p-nitroaniline and p-(N,N-dimethylaminobenzylidene)-aniline, the selected non-liquid crystal material having no mesophase at any temperature and comprising more than zero percent and less than 15% of said composition.
Claim 17
Dependent Claim
54 words
A liquid crystal composition having positive dielectric anisotropy comprising: a negative dielectric anisotropy liquid crystal material: and a non-liquid crystal material selected from the group consisting of N-[p-dimethylaminobenzylidene)-p-nitroaniline and p-(N,N-dimethylaminobenzylidene)-aniline, the selected non-liquid crystal material having no mesophase at any temperature and comprising more than zero percent and less than 15% of said composition.
References Cited (Backward Citations)
DE2024269A1
Cited
US3853785A
Cited
JPS4892284A
Cited
DE2327036A1
Cited
US3795436A
Cited
US3796479A
Cited
US3881806A
Cited
US3815972A
Cited
US3792915A
Cited
JPS49130882A
Cited
DE2321632A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-09-28 | 1980-03-29 | 1980-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-28 | 1984-03-29 | 1984-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-28 | 1988-03-29 | 1988-09-28 | $7700.00 | Window Closed / Lapsed |