Patent US4325830A successfully refreshed from Google Patents.
US4325830A
Expired / Lapsed
US
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Three ring dioxane liquid crystalline compounds
Assignee: MERECK PATENT FRANKFURTER STRASSE 250 6100 DARMSTADT A Co OF GERMANY GmbH
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Filing: 1980-12-24
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Granted: 1982-04-20
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Expires: 2000-12-24
Abstract
Abstract Disclosed are compounds of the formula: ##STR1## where R is alkyl or alkoxy and R 1 is alkyl, alkoxy, cyano or nitro and where ring N is a benzene or saturated cyclohexane ring. The compounds of the invention are compatible and useful in admixture with the general classes of cyanophenyl dioxane and/or cyclohexyl dioxane type liquid crystalline compounds to provide a broad nematic temperature range mixture with advantageous electrooptical and other properties. Novel admixtures including preferably at least about 30 weight percent of the compounds of the invention are disclosed. Preferred admixtures also include at least about 30 weight percent of cyanophenyl dioxanes and at least about 20 weight percent of cyclohexyl dioxanes.
Inventors
- 👤 Nicholas L. Sethofer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:49
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/34; C09K19/3402; C07; C07C; C07C29/00; C07C29/132; C07C29/136; C07C29/147; C07C45/00; C07C45/27; C07C45/32; C07C45/37; C07C45/38; C07C47/00; C07C47/52; C07C47/546; C07C63/00; C07C63/33; C07C63/331; C07C63/49; C07D; C07D319/00; C07D319/04; C07D319/06; C07C2601/00; C07C2601/12; C07C2601/14; C09K2019/3422
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
32 words
A compound of the formula: ##STR37## where R 1 is alkyl or alkoxy and R 2 is alkyl or alkoxy and where ring N is a benzene or a saturated cyclohexane ring.
Claim 2
Dependent Claim
32 words
A compound of the formula: ##STR37## where R 1 is alkyl or alkoxy and R 2 is alkyl or alkoxy and where ring N is a benzene or a saturated cyclohexane ring.
Claim 3
Dependent Claim
26 words
A liquid crystalline compound of the formula: ##STR38## where R 1 and R 2 independently can be the same or different alkyl group or alkoxy group.
Claim 4
Dependent Claim
26 words
A liquid crystalline compound of the formula: ##STR38## where R 1 and R 2 independently can be the same or different alkyl group or alkoxy group.
Claim 5
Dependent Claim
26 words
A liquid crystalline compound of the formula: ##STR39## where R 1 and R 2 independently can be the same or different alkyl group or alkoxy group.
Claim 6
Dependent Claim
26 words
A liquid crystalline compound of the formula: ##STR39## where R 1 and R 2 independently can be the same or different alkyl group or alkoxy group.
Claim 7
Dependent Claim
45 words
A nematic liquid crystal admixture comprising at least about 30 weight percent of a compound of the formula: ##STR40## where R 1 is alkyl or alkoxy and R 2 is alkyl or alkoxy and where ring N is a benzene or a saturated cyclohexane ring.
Claim 8
Dependent Claim
45 words
A nematic liquid crystal admixture comprising at least about 30 weight percent of a compound of the formula: ##STR40## where R 1 is alkyl or alkoxy and R 2 is alkyl or alkoxy and where ring N is a benzene or a saturated cyclohexane ring.
Claim 9
Dependent Claim
102 words
A nematic liquid crystal mixture comprising at least one compound of the formula: ##STR41## where R 1 and R 2 independently can be the same or different alkyl group or alkoxy group and further comprising at least one compound of the formula (a): ##STR42## where R 3 is an alkyl group or alkoxy group, or of the formula (b): ##STR43## where R 4 and R 5 independently can be the same or different alkyl group or alkoxy group, or of the formula (c): ##STR44## where R 6 and R 7 independently can be the same or different alkyl group or alkoxy group.
Claim 10
Dependent Claim
102 words
A nematic liquid crystal mixture comprising at least one compound of the formula: ##STR41## where R 1 and R 2 independently can be the same or different alkyl group or alkoxy group and further comprising at least one compound of the formula (a): ##STR42## where R 3 is an alkyl group or alkoxy group, or of the formula (b): ##STR43## where R 4 and R 5 independently can be the same or different alkyl group or alkoxy group, or of the formula (c): ##STR44## where R 6 and R 7 independently can be the same or different alkyl group or alkoxy group.
Claim 11
Dependent Claim
90 words
A nematic liquid crystal admixture comprising at least about 30 weight percent of a compound of the formula: ##STR45## where R 1 and R 2 can be the same or different alkyl or alkoxy, and comprising at least about 30 weight percent of a compound of the formula: ##STR46## where R 3 is an alkyl or alkoxy group, and further comprising at least about 20 weight percent of a compound of the formula: ##STR47## where R 4 and R 5 can be the same or different alkyl or alkoxy group.
Claim 12
Dependent Claim
90 words
A nematic liquid crystal admixture comprising at least about 30 weight percent of a compound of the formula: ##STR45## where R 1 and R 2 can be the same or different alkyl or alkoxy, and comprising at least about 30 weight percent of a compound of the formula: ##STR46## where R 3 is an alkyl or alkoxy group, and further comprising at least about 20 weight percent of a compound of the formula: ##STR47## where R 4 and R 5 can be the same or different alkyl or alkoxy group.
Claim 13
Dependent Claim
12 words
An electrooptical display containing the compound claimed in claim 2 or 3.
Claim 14
Dependent Claim
15 words
An electrooptical display containing the nematic liquid crystal mixture claimed in claim 5 or 6.
Claim 15
Dependent Claim
10 words
An electrooptical display containing the compound claimed in claim 1.
References Cited (Backward Citations)
DE2257588A1
Cited
US3947375A
Cited
US4085222A
Cited
US4062798A
Cited
US4130502A
Cited
US4154697A
Cited
US4181625A
Cited
US4211666A
Cited
DD139867A1
Cited
DD139852A1
Cited
US4273929A
Cited
US4200580A
Cited
GB2044767A
Cited
GB2063288A
Cited
US4298528A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-04-19 | 1985-10-19 | 1986-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-04-19 | 1989-10-19 | 1990-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-04-19 | 1993-10-19 | 1994-04-20 | $7700.00 | Window Closed / Lapsed |