US3981817A
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Mixtures of liquid crystals
Assignee: Hoffmann La Roche Inc
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Filing: 1974-03-27
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Granted: 1976-09-21
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Expires: 1994-03-27
Abstract
Abstract Liquid crystalline mixtures comprising at least three compounds of the formula WHEREIN R is n-butyl, n-pentyl, n-hexyl, n-heptyl or n-octyl, which may additionally contain other nematic or non-nematic substances, are described. The liquid crystalline mixtures are useful, for example, as dielectrics for electro-optical purposes.
Inventors
- 👤 Arthur Boller
- 👤 Hanspeter Scherrer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:27
CPC Classifications
C; C07; C07C; C07C255/00; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/10; C09K19/20; C09K19/2007; C09K19/42; C09K19/46
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
23 words
A mixture which contains p-n-octylbenzoic acid p'-cyanophenyl ester, p-n-hexylbenzoic acid p'-cyanophenyl ester and p-n-butylbenzoic acid p'-cyanophenyl ester in a molar ratio of 1:1:1.
Claim 2
Dependent Claim
23 words
A mixture which contains p-n-octylbenzoic acid p'-cyanophenyl ester, p-n-hexylbenzoic acid p'-cyanophenyl ester and p-n-butylbenzoic acid p'-cyanophenyl ester in a molar ratio of 1:1:1.
Claim 3
Dependent Claim
23 words
A mixture which contains p-n-octylbenzoic acid p'-cyanophenyl ester, p-n-hexylbenzoic acid p'-cyanophenyl ester and p-n-butylbenzoic acid p'-cyanophenyl ester in a molar ratio of 2:1:1.
Claim 4
Dependent Claim
23 words
A mixture which contains p-n-octylbenzoic acid p'-cyanophenyl ester, p-n-hexylbenzoic acid p'-cyanophenyl ester and p-n-butylbenzoic acid p'-cyanophenyl ester in a molar ratio of 2:1:1.
Claim 5
Dependent Claim
23 words
A mixture which contains p-n-octylbenzoic acid p'-cyanophenyl ester, p-n-hexylbenzoic acid p'-cyanophenyl ester and p-n-butylbenzoic acid p'-cyanophenyl ester in a molar ratio of 2:3:3.
Claim 6
Dependent Claim
23 words
A mixture which contains p-n-octylbenzoic acid p'-cyanophenyl ester, p-n-hexylbenzoic acid p'-cyanophenyl ester and p-n-butylbenzoic acid p'-cyanophenyl ester in a molar ratio of 2:3:3.
Claim 7
Dependent Claim
23 words
A mixture which contains p-n-octylbenzoic acid p'-cyanophenyl ester, p-n-hexylbenzoic acid p'-cyanophenyl ester and p-n-butylbenzoic acid p'-cyanophenyl ester in a molar ratio of 3:2:3.
Claim 8
Dependent Claim
23 words
A mixture which contains p-n-octylbenzoic acid p'-cyanophenyl ester, p-n-hexylbenzoic acid p'-cyanophenyl ester and p-n-butylbenzoic acid p'-cyanophenyl ester in a molar ratio of 3:2:3.
Claim 9
Dependent Claim
23 words
A mixture which contains p-n-octylbenzoic acid p'-cyanophenyl ester, p-n-hexylbenzoic acid p'-cyanophenyl ester and p-n-butylbenzoic acid p'-cyanophenyl ester in a molar ratio of 3:3:2.
Claim 10
Dependent Claim
23 words
A mixture which contains p-n-octylbenzoic acid p'-cyanophenyl ester, p-n-hexylbenzoic acid p'-cyanophenyl ester and p-n-butylbenzoic acid p'-cyanophenyl ester in a molar ratio of 3:3:2.
Claim 11
Dependent Claim
23 words
A mixture which contains p-n-heptylbenzoic acid p'-cyanophenyl ester, p-n-hexylbenzoic acid p'-cyanophenyl ester and p-n-butylbenzoic acid p'-cyanophenyl ester in a molar ratio of 1:1:1.
Claim 12
Dependent Claim
23 words
A mixture which contains p-n-heptylbenzoic acid p'-cyanophenyl ester, p-n-hexylbenzoic acid p'-cyanophenyl ester and p-n-butylbenzoic acid p'-cyanophenyl ester in a molar ratio of 1:1:1.
Claim 13
Dependent Claim
23 words
A mixture which contains p-n-octylbenzoic acid p'-cyanophenyl ester, p-n-heptylbenzoic acid p'-cyanophenyl ester and p-n-butylbenzoic acid p'-cyanophenyl ester in a molar ratio of 1:1:1.
Claim 14
Dependent Claim
23 words
A mixture which contains p-n-octylbenzoic acid p'-cyanophenyl ester, p-n-heptylbenzoic acid p'-cyanophenyl ester and p-n-butylbenzoic acid p'-cyanophenyl ester in a molar ratio of 1:1:1.
Claim 15
Dependent Claim
23 words
A mixture which contains p-n-octylbenzoic acid p'-cyanophenyl ester, p-n-hexylbenzoic acid p'-cyanophenyl ester and p-n-pentylbenzoic acid p'-cyanophenyl ester in a molar ratio of 1:1:1.
Claim 16
Dependent Claim
23 words
A mixture which contains p-n-octylbenzoic acid p'-cyanophenyl ester, p-n-hexylbenzoic acid p'-cyanophenyl ester and p-n-pentylbenzoic acid p'-cyanophenyl ester in a molar ratio of 1:1:1.
Claim 17
Dependent Claim
23 words
A mixture which contains p-n-octylbenzoic acid p'-cyanophenyl ester, p-n-heptylbenzoic acid p'-cyanophenyl ester and p-n-pentylbenzoic acid p'-cyanophenyl ester in a molar ratio of 1:1:1.
Claim 18
Dependent Claim
23 words
A mixture which contains p-n-octylbenzoic acid p'-cyanophenyl ester, p-n-heptylbenzoic acid p'-cyanophenyl ester and p-n-pentylbenzoic acid p'-cyanophenyl ester in a molar ratio of 1:1:1.
Claim 19
Dependent Claim
27 words
A mixture which contains p-n-butylbenzoic acid p'-cyanophenyl ester, p-n-hexylbenzoic acid p'-cyanophenyl ester, p-n-heptylbenzoic acid p'-cyanophenyl ester and p-n-octylbenzoic acid p'-cyanophenyl ester in a molar ratio of 1:1:1:1.
Claim 20
Dependent Claim
27 words
A mixture which contains p-n-butylbenzoic acid p'-cyanophenyl ester, p-n-hexylbenzoic acid p'-cyanophenyl ester, p-n-heptylbenzoic acid p'-cyanophenyl ester and p-n-octylbenzoic acid p'-cyanophenyl ester in a molar ratio of 1:1:1:1.
Claim 21
Dependent Claim
27 words
A mixture which contains p-n-pentylbenzoic acid p'-cyanophenyl ester, p-n-hexylbenzoic acid p'-cyanophenyl ester, p-n-heptylbenzoic acid p'-cyanophenyl ester and p-n-octylbenzoic acid p'-cyanophenyl ester in a molar ratio of 1:1:1:1.
Claim 22
Dependent Claim
27 words
A mixture which contains p-n-pentylbenzoic acid p'-cyanophenyl ester, p-n-hexylbenzoic acid p'-cyanophenyl ester, p-n-heptylbenzoic acid p'-cyanophenyl ester and p-n-octylbenzoic acid p'-cyanophenyl ester in a molar ratio of 1:1:1:1.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-09-21 | 1980-03-22 | 1980-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-21 | 1984-03-22 | 1984-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-21 | 1988-03-22 | 1988-09-21 | $7700.00 | Window Closed / Lapsed |