Patent US2058033A successfully refreshed from Google Patents.
Patent US3853785A successfully refreshed from Google Patents.
US3853785A
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Stable liquid crystal mixtures including anil-type nematic compounds
Assignee: Temple University
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Filing: 1972-11-06
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Granted: 1974-12-10
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Expires: 1992-11-06
Abstract
Abstract Stable anil-type nematic liquid crystals of the formula WHEREIN R1 and R2 are each an alkyl, alkoxy, alkylester, aryl, aryloxy, arylester, aralkyl, carboxylic acid, halogen, nitro, cyano group or the like are combined with other liquid crystal materials to produce a liquid crystal composition of enhanced stability and/or broadened active temperature range. The liquid crystal mixtures of this invention, because of their excellent stability, are especially useful in light valves, optical display devices and similar applications which involve the modulation of light.
Inventors
- 👤 M Labes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:48
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/42; C09K19/48; C09K19/06; C09K19/08; C09K19/10; C09K19/22
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
65 words
A NEMATIC LIQUID CRYSTAL COMPOSITION USEFUL IN ELECTROOPTICAL DEVICES CONSISTING OF A MISCIBLE MIXTURE OF A. A FIRST NEMATIC LIQUID CRYSTAL MATERIAL CONSISTING OF THE COMPOUND N-(O-HYDROXY-P-METHOXYBENZYLIDENE)-P-NBUTYLANILINE, AND B. A SECOND NEMATIC LIQUID CRYSTAL MATERIAL CONSISTING OF THE COMPOUND N-(P-ETHOXY-BENZYLIDENE)-P-N-BUTYLANILINE WHEREIN EACH NEMATIC LIQUID CRYSTAL MATERIAL IS PRESENT IN AN AN AMOUNT SUFFICIENT TO STABILIZE AND/OR BROADEN THE ACTIVE TEM PERATURE RANGE OF THE COMPOSITION.
Claim 2
Dependent Claim
65 words
A NEMATIC LIQUID CRYSTAL COMPOSITION USEFUL IN ELECTROOPTICAL DEVICES CONSISTING OF A MISCIBLE MIXTURE OF A. A FIRST NEMATIC LIQUID CRYSTAL MATERIAL CONSISTING OF THE COMPOUND N-(O-HYDROXY-P-METHOXYBENZYLIDENE)-P-NBUTYLANILINE, AND B. A SECOND NEMATIC LIQUID CRYSTAL MATERIAL CONSISTING OF THE COMPOUND N-(P-ETHOXY-BENZYLIDENE)-P-N-BUTYLANILINE WHEREIN EACH NEMATIC LIQUID CRYSTAL MATERIAL IS PRESENT IN AN AN AMOUNT SUFFICIENT TO STABILIZE AND/OR BROADEN THE ACTIVE TEM PERATURE RANGE OF THE COMPOSITION.
Claim 3
Dependent Claim
63 words
A nematic liquid crystal composition useful in electro-optical devices consisting of a miscible mixture of a. a first nematic liquid crystal material consisting of the compound N-(o-hydroxy-p-methoxybenzylidene)-p-n-butylaniline, and b. a second nematic liquid crystal material consisting of the compound N-(p-methoxybenxylidene)-p-n-pentylaniline wherein each nematic liquid crystal material is present in an amount sufficient to stabilize and/or broaden the active temperature range of the composition.
Claim 4
Dependent Claim
63 words
A nematic liquid crystal composition useful in electro-optical devices consisting of a miscible mixture of a. a first nematic liquid crystal material consisting of the compound N-(o-hydroxy-p-methoxybenzylidene)-p-n-butylaniline, and b. a second nematic liquid crystal material consisting of the compound N-(p-methoxybenxylidene)-p-n-pentylaniline wherein each nematic liquid crystal material is present in an amount sufficient to stabilize and/or broaden the active temperature range of the composition.
Claim 5
Dependent Claim
23 words
A composition, as recited in claim 1, wherein said second nematic liquid crystal material comprises 20 - 95 weight percent of the composition.
Claim 6
Dependent Claim
23 words
A composition, as recited in claim 2, wherein said second nematic liquid crystal material comprises 15 - 80 weight percent of the composition.
Claim 7
Dependent Claim
39 words
A nematic liquid crystal composition useful in electro-optical devices consisting of a miscible mixture of a. a first nematic liquid crystal material consisting of the compound N-(o-hydroxy-p-methoxybenzylidene)-p-n-butylaniline, and b. a second nematic liquid crystal material consisting of the compound-mixture
Claim 8
Dependent Claim
39 words
A nematic liquid crystal composition useful in electro-optical devices consisting of a miscible mixture of a. a first nematic liquid crystal material consisting of the compound N-(o-hydroxy-p-methoxybenzylidene)-p-n-butylaniline, and b. a second nematic liquid crystal material consisting of the compound-mixture
Claim 9
Dependent Claim
29 words
A nematic liquid crystal composition useful in electro-optical devices consisting of a miscible mixture of a. a fIrst nematic liquid crystal material consisting of a compound of the formula
Claim 10
Dependent Claim
29 words
A nematic liquid crystal composition useful in electro-optical devices consisting of a miscible mixture of a. a fIrst nematic liquid crystal material consisting of a compound of the formula
References Cited (Backward Citations)
US3773747A
Cited
US3720623A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |